Romans 11:1-2, 20

So I ask: Did God throw out his people? No! I myself am an Israelite from the family of Abraham, from the tribe of Benjamin. God chose the Israelites to be his people before they were born, and he has not thrown his people out. Surely you know what the Scripture says about Elijah, how he prayed to God against the people of Israel.

That is true. But those branches were broken off because they did not believe, and you continue to be part of the tree only because you believe. Do not be proud, but be afraid.