What do you make of Romans, Chapter 11 then? It is all about the children of Israel, not "spiritualized" Israel.
The promise of Romans 11 is that "all Israel" will be saved. I take "all Israel" to mean all those from the physical descendants of Israel that God has chosen in Christ to be saved. This is an ongoing process that will continue "until the fullness of the Gentiles has come in." It says nothing about a physical restoration to the land or rebuilding of the temple. They are being restored by being grafted into the root, that is, Jesus Christ, just as believing gentiles are grafted in.