THE RESTORATION OF EARTH
Amillennialists and post-Millennialists distance themselves from God's special treatment of the Jews in the Millennium, viewing it as a backward reinstatement of the Old Covenant. But we ought to recognize the centrality of the Jews at that time because priority on end-time Israel is a repeated theme throughout all the prophets.
While I as a Gentile Christian accept this without prejudice, with gladness for fallen Jacob, and in stride with the desire of God to restore him, there are some Christians wishing nothing of the sort. They say God is done with Israel, forever, and that God now stresses only the Christian Church, which they call the "New Israel." But the Church is not a new Israel, but the old Israel renewed. Big difference. In fact, the Christian Church is the primaryIsrael--the true Israel of God into which all Jews, including the end-time Jewish remnant, must be regrafted.
Paul in Romans attests to the validity of using Old-Testament prophecies to support the restoration of Jews to Christ when in the following verses he quotes from Isaiah 59:20-21:
"Hardness in part to Israel has happened until the fullness of the Gentiles comes in, and so all Israel will be saved, as it has been written [in Isaiah], 'The Deliverer will come out of Zion, who will turn godlessness away from Jacob. And this is My covenant with them, when I take away their sins'" (Romans 11:25-27).
Isaiah is not speaking of the first coming of Christ when he says, "The Deliverer will come to Zion," but of the second coming to restore Israel once and for all, from the ashes of Armageddon. The Deliverer is to come when "all Israel" will be saved, when God removes Zion's sins forever. "All Israel" cannot be defined as all Jews of the Abrahamic bloodline, including the Pharisees et al, can it? Rather, the phrase indicates the whole tree of Israel which the apostle was just referring to previously, the tree with the "wild" and "natural" branches. While the Gentile branches have been grafted into the tree of Israel because of God's rejection of many Jewish branches, the latter will nonetheless be (re)grafted at the end of this present age.
Therefore, as "all" in "all Israel" is referring to both the wild and native branches, Paul was including the Jewish remnant of the end times as an indispensable part of the Church/Israel, and not until that small but all-important remnant is saved will "all Israel" be saved. This Jewish segment is exposed in Old-Testament prophecies as a mortal remnant, survivors of Armageddon that then continue into the Millennium with their normal flesh bodies.