'Nation' is from Hebrew "goy" (or Greek "ethnos"). It primarily means a people group. It has come to mean a non-Jew. The latin translation of goy is gentile. But, is the Bible only concerned with non-Jews with regard to healing?

 

Genesis 35:10-11 (goy refers to Israel and the twelve tribes here)

LITV 10 And God said to him, Your name is Jacob; your name will not any more be called Jacob, but Israel will be your name. And He called his name Israel. 11 And God said to him, I am God Almighty; be fruitful and multiply. A nation and a company of nations shall be from you. And kings shall go forth from your loins.

Jeremiah 30:12-17 (the goy in need of healing here is Israel)

LITV 12 For so says Jehovah, Your break cannot be cured; your wound is grievous. 13 There is no one to plead your cause; for your ulcer there are no healing medicines for you. 14 All your lovers have forgotten you; they do not seek you. For I have wounded you with the wound of an enemy, with the chastisement of a cruel one, because of the greatness of your iniquity. Your sins are many. 15 Why do you cry out over your crushing? Your pain is incurable, for the greatness of your iniquity; your sins are many, so I have done these things to you. 16 Therefore, all those who devour you shall be devoured. And all your enemies, every one of them, shall go into captivity. And they who rob you shall be given for plunder; and all who strip you, I will give to be stripped. 17 For I will give health back to you, and I will heal you of your wounds, says Jehovah, because they called you, Outcast; saying, This is Zion; no one is seeking for her.

Ezekiel 47:12 (the garden-city image suggests it's God's covenant people that get healed)

KJV 12 And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine.

Malachi 4:2

CAB 2 But to you that fear My name shall the Sun of righteousness arise, and healing shall be in His wings: and you shall go forth, and bound as young calves let loose from bonds.

Revelation 22:2 (the 12 apostles of Yeshua were first to bear fruit to the 12 tribes)

KJV 2 In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.

Jesus cursed a fruit tree to "never bear fruit again" on His way into the typical city with the typical sanctuary; then on the eighth day He started a new body of people. He was the first to be resurrected into the new and fruitful national body.

Matthew 21:18-22 

LITV 18 And returning early to the city, He hungered. 19 And seeing one fig tree by the road, He went up to it, and found nothing on it except leaves only. And He said to it, Let there be no more fruit from you forever. And the fig tree immediately dried up. 20 And seeing, the disciples marveled, saying, How quickly the fig tree is dried up! 21 And answering, Jesus said to them, Truly I say to you, If you have faith and do not doubt, not only will you do the miracle of the fig tree, but even if you should say to this mountain, Be taken up and thrown into the sea, it will be so. 22 And all things, whatever you may ask in prayer, believing, you shall receive.

The fig tree represented the typical city that was all show with no fruit. It may also remind us of the failure of the fig leaf to provide sufficient cover after the fall. The oppressive legalism of the pharisees produced more of that inadequate covering. They tended to rule more through guilt and fear rather than providing a real propitiation. The symbolic tree that Jesus destroyed took up ground and collected light only to serve itself. The typical temple on the mount was also doomed by Jesus, to be destroyed by the Romans. The Romans are Biblically the sea that comes in like a flood in AD 70 to remove the unfruitful temple and city structure. After AD 70 there is no more symbolic sea outside the city since the new city of God is without land boundaries. All nations today have equal access to God through the body of Christ. Anyone can take cover under the Tree Of Life in New Zion. Jesus came out of the real most Holy Place in heaven and destroyed the copy, because all the typical sacrifices and copies of the true temple only served to point us to His final propitiation. They are no better than fig leaves now when compared to Christ. Turning back to 'fig leaves' is not a valid option once a better cover is in place.

Hebrews 12:22

YLT 22 But, ye came to Mount Zion, and to a city of the living God, to the heavenly Jerusalem, and to myriads of messengers,

Hebrews 13:10 (during the transition years)

LITV 10 We have an altar of which those serving the tabernacle have no authority to eat.

Revelation 22:19

ALT 19 And if anyone takes away from the words of the scroll of this prophecy, may God take away his part from the tree of life and from the holy city, the [things] having been written in this scroll.

Who would want to change the meaning of Revelation more than those in the first century who rejected their promised messiah, wanting instead for the types to continue forever? Typical representatives try to take unfair advantage of their positions. They make everyone sick.

John 11:48

ALT 48 "If we leave Him in this way, all will believe [or, trust] in Him, and the Romans will come and will take away both our place and nation."

Mark 14:56

ALT 56 For many were giving false testimony against Him, but their testimonies were not consistent.

Did not the gospel of eternal life go from the 12 apostles to the 12 tribes first, and then they bore fruit to the other nations?

John 15:1-8 (Jesus pruned his Jewish disciples to bear much fruit)

LITV 1 I am the True Vine, and My Father is the Vinedresser. 2 Every branch in Me not bearing fruit, He takes it away; and each one bearing fruit, He prunes, so that it may bear more fruit. 3 You are already pruned because of the Word which I have spoken to you. 4 Remain in Me, and I in you. As the branch is not able to bear fruit of itself, unless it remain in the vine, so neither can you unless you remain in Me. 5 I am the Vine; you are the branches. He that remains in Me, and I in him, this one bears much fruit. For apart from Me you are not able to do anything. 6 Unless one remains in Me, he is cast out as the branch and is dried up; and they gather and throw them into a fire, and they are burned. 7 If you remain in Me, and My words remain in you, whatever you desire you will ask, and it shall happen to you. 8 In this My Father is glorified, that you should bear much fruit; and you will be My disciples.

Matthew 3:10 (trees here probably represent first century leaders)

YLT 10 and now also, the axe unto the root of the trees is laid, every tree therefore not bearing good fruit is hewn down, and to fire is cast.
 

Colossians 1:4-6 (heavenly Jerusalem extends) 

LITV 4 hearing of your faith in Christ Jesus and the love toward all the saints, 5 because of the hope being laid up for you in Heaven, which you heard before in the Word of the truth of the gospel, 6 coming to you, as also in all the world, and it is bearing fruit even also among you, from the day in which you heard and knew the grace of God in truth;

Not only did Abraham circumcise a large gene pool of people with Isaac but many non related people left Egypt to join the melting-pot nation during the first exodus. Why is it surprising that many people from other nations joined reborn Israel after the second exodus? Genetics was never the covenant requirement or the sign. It did surprise the pharisees to find out that they would not rule the world militarily with Jesus in the new covenant. Jesus rules in all ethnics by circumcising the heart. 

Genesis 17:23-29 (Abraham circumcised foreigners)

YLT 23 And Abraham taketh Ishmael his son, and all those born in his house, and all those bought with his money—every male among the men of Abraham's house—and circumciseth the flesh of their foreskin, in this self-same day, as God hath spoken with him. 24 And Abraham is a son of ninety and nine years in the flesh of his foreskin being circumcised; 25 and Ishmael his son is a son of thirteen years in the flesh of his foreskin being circumcised; 26 in this self-same day hath Abraham been circumcised, and Ishmael his son; 27 and all the men of his house—born in the house, and bought with money from the son of a stranger—have been circumcised with him.

Genesis 14:14 (over 300 grown men had been born in his house)

CLV 14 And hearing is Abram that Lot, his brother, is captured. And numbering is he those dedicated to him, born in his household, three hundred and eighteen, and is pursuing them as far as Dan.

Exodus 12:38 (another conflation then leaves Egypt)

LITV 38 And also a mixed multitude went up with them, and flocks, and herds, very many livestock.

Romans 9:8

ALT 8 That is, the children of the flesh, these [are] not children of God, but the children of the promise are counted for seed [fig., descendents].

Galatians 4:28

ALT 28 Now we, brothers [and sisters], just like Isaac, are children of promise.

Ephesians 3:5-6 (the Jewish apostles took their covenant to all nations)

CLV 5 which, in other generations, is not made known to the sons of humanity as it was now revealed to His holy apostles and prophets): in spirit" 6 the nations are to be joint enjoyers of an allotment, and a joint body, and joint partakers of the promise in Christ Jesus, through the evangel"

Romans 4:13 

YLT 13 For not through law is the promise to Abraham, or to his seed, of his being heir of the world, but through the righteousness of faith;

Romans 4:13

ECB 13 
JUSTIFICATION VS THE TORAH 
For the pre-evangelism he had, being the heir of the cosmos, was not to Abraham or his sperma through the torah, but through the justness of trust.

Galatians 3:16

YLT 16 and to Abraham were the promises spoken, and to his seed; He doth not say, `And to seeds,' as of many, but as of one, `And to thy seed,' which is Christ;

Galatians 3:29

YLT 29 and if ye are of Christ then of Abraham ye are seed, and according to promise—heirs. 

God made it clear that having the right genetic connection is not His covenant requirement or guarantee.


Matthew 3:9

ALT 9 "And you(p) should not presume to be saying within yourselves, 'We have Abraham [as our] father,' for I say to you(p) that God is able to raise children to Abraham out of these stones.

The (living and eternal) human soul of Christ is and was re-created in his people by their being born again of the Holy Spirit, not by them being born of the 'holy jewish flesh'.

Acts 2:1-5

YLT 1 And in the day of the Pentecost being fulfilled, they were all with one accord at the same place, 2 and there came suddenly out of the heaven a sound as of a bearing violent breath, and it filled all the house where they were sitting, 3 and there appeared to them divided tongues, as it were of fire; it sat also upon each one of them, 4 and they were all filled with the Holy Spirit, and began to speak with other tongues, according as the Spirit was giving them to declare. 5 And there were dwelling in Jerusalem Jews, devout men from every nation of those under the heaven,

 

Galatians 5:22-23

YLT 22 And the fruit of the Spirit is: Love, joy, peace, long-suffering, kindness, goodness, faith, 23 meekness, temperance: against such there is no law;

God doesn't really need a certain building for a dwelling place, says the Jewish believer to the Jewish non-believers who were still serving at the typical temple of Herod that was about to be destroyed in favor of God's people. Stephen had the healing image of God living in Himself as he tried to reason with his bretheren still in their flesh mode.


Romans 8:9

YLT 9 And ye are not in the flesh, but in the Spirit, if indeed the Spirit of God doth dwell in you; and if any one hath not the Spirit of Christ—this one is not His;
 

Acts 7:49-53 

CLV 49 Heaven is My throne, yet the earth is a footstool for My feet. What kind of house shall be built for Me? the Lord is saying, or what is the place of My stopping? 50 Is it not My hand that does all these things?' 51 Stiff-necked and uncircumcised in your hearts and ears, you are ever clashing with the holy spirit! As your fathers, you also!" 52 Which of the prophets do not your fathers persecute? And they kill those who announce before concerning the coming of the Just One, of Whom now you became the traitors and murderers -" 53 who got the law for a mandate of messengers and do not maintain it!"

Galatians 5:22-23 THE SINGULAR FRUIT OF THE SPIRIT 

ECB 22 And the fruit of the Spirit: love, cheer, shalom, patience, kindness, goodness, trust, 23 meekness, self-control: against such there is no torah.

Thank God for the Jewish people who took His Word to all the nations.


2 Timothy 1:7

YLT 7 for God did not give us a spirit of fear, but of power, and of love, and of a sound mind;