It seems to me that in trying to understand God’s plan for the Jewish people and the land of Israel, there is a veil that hangs over the minds of many Gentile believers. God is clear, throughout Scripture, that He has eternal plans for the people he originally chose to be His #treasured possession’ (‘segullah’ = the special, particular and personal treasure of a King e.g. Deut.7:6, 14:2, 26:18). Yet some seem to think He has abandoned them and has no further use for them.
The main reason why Paul wrote his letter to the Romans, I believe, was to reject this latter view entirely. Indeed it is impossible to understand Romans (and some other Pauline epistles) unless we keep the Jewish/Gentile issue at the heart of our understanding. And it is a thread that runs all the way through Paul’s letter to the believers in Rome.