In all this, know that there is not a single impulse in me that is anti-Semitic or anti-Jewish-lover. I love the Jews like I love all my neighbors. This is simply trying to understand the Bible on its own terms.
Another reason from Romans that compels me to see that God has always had one plan for one people: Romans 2.28-29 says “For no one is a Jew who is merely one outwardly, nor is circumcision outward and physical, but a Jew is one inwardly, and circumcision is a matter of the heart by the Spirit, not by the letter. His praise is not from man but from God.”
Paul begins to explicitly use the word “Jew” in more than one way. All the references to “Jew first, then Greek” are clearly earthly, fleshly, ethnic references. But v28-29 are references to “spiritual” Jews. It would be easy to read the OT and never see this, but Paul says we should have known that the Jews we observe throughout OT history are not all necessarily Jews. And in fact he indicates that Gentiles could be considered “Jews” in Rom 2.26. Did human beings create the idea of a “spiritual Israel” or did the Holy Spirit?