I’m afraid that you have been wise in your own conceits, as the Apostle Paul warns in Romans chapter 11. No God is not finished with national Israel, as the davidic Covenant clearly mandates the Messiah will return for the remnant Israel Zechariah Chapter 12 13 and 14 just to name that book. Yes Gentiles have been grafted in, but the Apostle Paul makes it clear that the Jews can and will be grafted in again to the Natural branches. Acts chapter 9 clearly states how the Jewish leaders realize that God in this dispensation will take out for himself a people from the Gentiles, waiting for the final dispensation of the remnant of Israel at the End of the Age with shall be saved. It is a grave mistake to forget National Israel and God’s faithfulness to them.If God is Not faithful to Israel cannot be faithful to National Israel were the natural branches, then we do not have confidence in our Salvation as Gentiles. Keep reading my friend!
Maranatha - My only point regarding your comments is that there really is no longer a Biblical Israel. There is no Temple, thus no path to reconciliation. What we have is a secular nation made up primarily of people of Jewish descent who do not recognize/accept their Messiah. It is the job of Christians to help the find and be found by Messiah. God only knows what will become of them if they do not.