Romans 11:1 says, “I say then, has God cast away His people? Certainly not! For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.” God did not, in other words, abandon the Israelites, for Paul himself was also an Israelite.
God says in Romans 11:2-5, “God has not cast away His people whom He foreknew. Or do you not know what the Scripture says of Elijah, how he pleads with God against Israel, saying, “LORD, they have killed Your prophets and torn down Your altars, and I alone am left, and they seek my life”? But what does the divine response say to him? “I have reserved for Myself seven thousand men who have not bowed the knee to Baal.” Even so then, at this present time there is a remnant according to the election of grace.”
As God told us that there would be many Israelites coming back to Him by believing in Jesus, many Jews will be saved from their sins. We must believe that when the end of time comes, a great number of Gentiles will be redeemed of their sins by believing in the righteousness of God and coming to Jesus Christ.