I thought about posting this in the prophecy section, but this is really a matter of biblical consideration more than prophetic viewpoint. We read in Romans that Paul believes "all Israel" will be saved. The question is, Does Paul indicate all Jews will become Christians, or that the whole of Israel, within her boundaries, will be saved politically?
My guess is that Paul uses the term "salvation" in both ways simultaneously. That is, he is referring both to the political deliverance of the nation as well as to its Christian conversion.
But I don't believe he's talking about the salvation of every Jew! The conversion of the whole nation to the Christian religion is not the same thing as every individual embracing Christianity as his or her lifestyle!
Rather, Paul's talking about the political salvation of the nation along with its conversion, legally, to a Christian-based system. That is, the law of the land will become entirely Christian in focus, and will not be pluralistic in the religious sense.
What do you think? Here is the passage:
25 I do not want you to be ignorant of this mystery, brothers and sisters, so that you may not be conceited: Israel has experienced a hardening in part until the full number of the Gentiles has come in, 26 and in this way all Israel will be saved. As it is written:“The deliverer will come from Zion;
he will turn godlessness away from Jacob.
27 And this is my covenant with them
when I take away their sins.”
28 As far as the gospel is concerned, they are enemies for your sake; but as far as election is concerned, they are loved on account of the patriarchs, 29 for God’s gifts and his call are irrevocable.