I think there are a lot of people who say that the original ethnic nation is no longer Israel due to unbelief, and the believers are Israel, including gentiles.
That's not what is said Mark. What many have come to understand is that ethnic Israel, being Israel still, never stopped being Israel, however they are the part of Israel the nation, that has always been in unbelief. Those in unbelief do not belong to those in the nation who are of faith in Christ. Only those of faith are THE Israel of God. Those are not my words, but the words spoken by Paul. Israel in unbelief must turn in faith to Christ, if they are to be grafted into the same tree of faith as THE Israel of God.
Galatians 6:15-16 (KJV) For
in Christ Jesus neither circumcision availeth any thing, nor uncircumcision, but a new creature. And as many as walk according to this rule, peace
be on them, and mercy, and upon
the Israel of God.
The Israel of God are the believing Jews.
And yes, absolutely, salvation is not based on ethnicity.
Matthew 3:9
And think not to say within yourselves, We have Abraham to our father: for I say unto you, that God is able of these stones to raise up children unto Abraham.
Just the same, God promised that all the Israelites who remaim when Jesus comes will be saved by Him, both physically from the beast and the world's armies, and spiritually as He pours out His spirit on them.
I'm glad to see that you do understand why it is a bit difficult to know how to define Israel since in truth Israel is both a remnant in faith, and the part of them in blindness and unbelief.
Paul tells us God's promise is that ALL Israel shall be saved when the full number of Gentiles are grafted into the good tree of faith with Israel of faith. Not grafted with Israel in unbelief.
Paul shows how Israel is a remnant according to the election of grace. While natural Israel does not belong to the remnant, being blinded by unbelief. But natural Israel hasn't stumbled to utterly fall, they can be grafted back into Israel of faith, just as Gentiles of faith have also been. Because God said through their fall the Gospel was sent to the Gentiles that maybe Israel in unbelief, would desire to be saved as the Gentiles of faith also may be. It was Paul desire to save SOME of them in unbelief by telling them the Gospel of salvation is being offered to Gentiles. Paul says it was because of their unbelief that part of the branches (in unbelief) were broken off, that Gentiles too might be grafted in with Israel of faith. But just as God did not spare the natural branches, neither would He spare Gentiles IF they did not keep the faith, they too would be broken off, just as Israel in part in unbelief were not spared by God.
Paul concludes the matter by saying blindness in part happened to Israel that the Gospel would be sent also to them. And it is through Gentiles of faith becoming part of Israel of faith that ALL Israel shall be saved. Not that ALL Israelites in unbelief alive when Christ comes shall be saved, but that Israel, at least THE Israel of God is not an ethnic people but ALL people of faith. Paul is NOT speaking of that part of Israel in blindness and unbelief, he is speaking of whosoever has been born again as THE Israel of God who shall ALL be saved by the Deliverer who comes out of Sion and turns away ungodliness from the seed (Christ) of Jacob, because God's Covenant is with them and their sins shall be taken away.
Romans 11:5 (KJV) Even so then
at this present time also there is a remnant according to the election of grace.
Romans 11:7 (KJV) What then?
Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded
Romans 11:11-14 (KJV) I say then,
Have they stumbled that they should fall? God forbid: but rather through their fall salvation is come unto the Gentiles, for to provoke them to jealousy. Now if the fall of them
be the riches of the world, and
the diminishing of them the riches of the Gentiles; how much more their fulness? For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office: If by any means
I may provoke to emulation them which are my flesh, and might save some of them.
Romans 11:19-22 (KJV) Thou wilt say then,
The branches were broken off, that I might be graffed in. Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear: For if God spared not the natural branches, take heed lest he also spare not thee. Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
Romans 11:23 (KJV) And they also,
if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again.
Romans 11:23-27 (KJV) And they also, if they abide not still in unbelief, shall be graffed in: for God is able to graff them in again. For if
thou wert cut out of the olive tree which is wild by nature, and wert graffed contrary to nature into a good olive tree: how much more shall these, which be the natural branches, be graffed into their own olive tree? For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits;
that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob: For this is my covenant unto them, when I shall take away their sins.
God's Covenant of Redemption through the Gospel of His Son has always been a promise God made to ALL people of faith. It is they who are the true Israel of God. Because the people of God are neither Jew nor Gentile but one people of God, called by the name of Christ, Christians. When Christ returns only they who are of faith shall be saved. Israel still in unbelief when Christ comes again, like all the people of all the nations of the world that remain in unbelief when He comes shall be utterly destroyed.
Isaiah 59:20-21
(20) And the Redeemer shall come to Zion, and unto them that turn from transgression in Jacob, saith the LORD.
(21) As for me, this is my covenant with them, saith the LORD; My spirit that is upon thee, and my words which I have put in thy mouth, shall not depart out of thy mouth, nor out of the mouth of thy seed, nor out of the mouth of thy seed's seed, saith the LORD, from henceforth and for ever.
This even given to Jacob, who only signifies the original ethnic Israel. And of course there are many many prophecies of the saving and restoration of that nation, which I believe will be fulfilled.
Read carefully what is written in Isaiah. The Redeemer comes from Zion and unto them that turn from transgression in Jacob. Because the Covenant is with them. Isaiah is speaking of Israel in faith, not the part in blindness and unbelief. That's why he writes "in Jacob" instead of saying transgression shall be removed from Israel. Jacob is the personal name given those who have come from the Seed (Christ) of faith. They are all people of faith who come from the seed of Abraham, Isaac and Jacob, that Seed is Christ. That's why it is written, "Jacob have I loved", not Israel have I loved, because not all who are of Israel are of the Seed of Abraham, the Seed (Christ) of faith. God's Covenant is with them, all who are of faith that includes Jews and Gentiles of faith in Christ together, and are THE Israel of God.
Romans 9:6-13 (KJV) Not as though the word of God hath taken none effect.
For they are not all Israel, which are of Israel: Neither, because they are the seed of Abraham, are they all children: but, In Isaac shall thy seed be called. That is,
They which are the children of the flesh, these are not the children of God: but the children of the promise are counted for the seed. For this is the word of promise, At this time will I come, and Sara shall have a son. And not only this; but when Rebecca also had conceived by one, even by our father Isaac; (For
the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth;) It was said unto her, The elder shall serve the younger.
As it is written, Jacob have I loved, but Esau have I hated.
I think @Randy Kluth has a point. Like Walter Martin was fond of saying, "Words have meanings". Israel is a certain thing, in this case, a particular people group. And the Bible does in fact demonstrate two uses for it, but both concern the same people. There are the descendants of Jacob, Israel, , and there are the believing descendants of Jacob, the Israel of God.
Much love!
Words indeed do have meaning. And I agree the Bible does use the word Israel to demonstrate two types of people both called by the same name. But I cannot agree that both concern the same people! Because the Israel of God has never been one people, the Jewish nation called Israel, the Israel of God has always been ALL people of faith regardless of what nation they have come to faith in Christ from.
Much love to you also Marks!