Romans 11:26-27
26 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:
27 For this is my covenant unto them, when I shall take away their sins.
How can there be a future for the nation of Israel since they rejected the Messiah?
PROBLEM: The nation of Israel clearly rejected Christ as their Messiah (Romans 9; cf. John 1:10-11). And the Bible says that the promises of Abraham go to his spiritual seed, not his descendants according to the flesh (Romans 4; Galatians 3). Why then does Romans 11 speak of a future for the nation of Israel?
SOLUTION: Abraham has both a spiritual seed (descendants) and literal descendants. Anyone who believes in Christ can become a spiritual heir of the promise for justification (Romans 4; cf. Genesis 15), because Christ came of the seed of Abraham (Galatians 3:16).
However, there are also promises to Abraham’s literal descendants, the Jews, that have never yet been completely fulfilled. For example, God unconditionally promised that Abraham’s literal descendants would inherit the land of Palestine forever (Genesis 12:1-3; Genesis 13:15; Genesis 15:7; Genesis 17:8). Only one short time in Israel’s history did they inherit this land (Joshua 11:23), but God gave it to them by an unconditional oath (cf. Genesis 15:7-21) “forever” (Genesis 13:15), as an “everlasting possession” (17:8). Since God cannot break an unconditional promise (Hebrews 6:17-18; 2 Timothy 2:13), this promise is yet to be fulfilled for the nation of Israel.
Paul is speaking of the literal descendants of Abraham, the children of Israel in Romans 9–11. He calls them “my kinsmen according to the flesh, who are Israelites” (Romans 9:3-4) and “Israel” (Romans 10:1). This same national group (Israel) that was temporarily cut off will be grafted in again into the tree, and “all Israel will be saved” (Romans 11:26). Jesus spoke of this time in Acts 1 when asked by His disciples, “Will You at this time restore the kingdom to Israel?” (Acts 1:6) His answer was not a stern rebuke for misunderstanding the Scriptures, but an assurance that only the Father knows the “times or seasons” in which this will occur (v. 7). Earlier Jesus spoke of “the regeneration, when the Son of Man sits on the throne of His glory, [and] you who have followed Me will also sit on twelve thrones, judging the twelve tribes of Israel” (Matthew 19:28). Indeed, in the final book of the Bible, the Apostle John spoke of God redeeming out of the tribulation “one hundred and forty-four thousand of all the tribes of the children of Israel” (Revelation 7:4). So there is every reason to believe that God will honor His unconditional covenant to Israel to give them the land of Palestine forever.