Don’t be to smug!
Both the Jews and the gentiles who have faith and trust in the death and resurrection of Jesus the Messiah are now united as one people. Ephesians 2:11-18. But we must remember, we gentiles are only grafted into the vine because of Jewish unbelief. We who are olive branches can be removed, since God can do anything. This doctrine takes apart the teaching of ‘once saved always saved.’ Romans 11:11-36.
We are given a serious warning in Romans 11:20-22, which should be heeded.
Meanwhile God has a separate plan for Israel.
Romans 11: 25-27, Isaiah 59:20-21, Isaiah 27:9, Jeremiah 31:33-34, Hebrews 8:8-12, 10:16-17.