God never goes back on a promise nor does He ever break His covenants. Only man does that. I don’t read that in the New Testament. God is the same Yesterday, Today, and Tomorrow.
“...I don’t read that in the New Testament.”
Paul the apostle would be rather shocked also (Romans 11). Israel is the Lord’s “First born” (Exodus 4:22)and He is far from abandoning His original chosen people. The Old Testament and New Testaments are loaded with prophecies yet to be fulfilled concerning the Jews. Every part of scripture will come to completion according to His word and for His glory.