So here is what I ask. Did God turn his back on his people? Not at all! I myself belong to Israel. I am one of Abraham's children. I am from the tribe of Benjamin.
References for Romans 11:1
God didn't turn his back on his people. After all, he chose them. Don't you know what Scripture says about Elijah? He complained to God about Israel.
He said, "Lord, they have killed your prophets. They have torn down your altars. I'm the only one left. And they are trying to kill me."(1 Kings 19:10,14)
How did God answer him? God said, "I have kept 7,000 people for myself. They have not bowed down to Baal."(1 Kings 19:18)
Some are also faithful today. They have been chosen by God's grace.
And if they are chosen by grace, it is no longer a matter of working for it. If it were, grace wouldn't be grace anymore.