Wrong. Jews worship God and the same God. Have you not read any of the ‘beggars’ in the Bible? Jesus bloodline is well tracked and Jesus spoke of God as the one Jews worshipped very clearly, not as a new God. Jews just don’t believe Jesus was sin if their God, that God had a son and He came to earth and is the messiah they’ve been awaiting.
You’re not very familiar with Christian scripture- the God Jesus spoke at length about is the God of Abraham, not a new God.
Jesus didn’t supplant the God of Abraham.
Jews believe in God. They just don’t believe in Christ. (Believing in Christ is what makes one Christian. Christ. Christian. Get it?).
Our God is the same. Jesus is a cheat code to get to Him. Simple as.