Jews were not totally bad as you seem to want to make them to be.
After mentioning Jews who were failures?
You neglected something else.
God chose and used Jews to write the New Testament.
God used chose and used Jews to spread the Gospel in the early days of the Church.
Whys that?
Never used the word bad. The Jews are great. They just messed up.
They were expecting things from God they did not get. And so some would chase after false gods.
Yahweh told them that it would be good for them to go to Egypt and when they got there they were enslaved.
The Old Testament spans about 3600 years, if God was not right on top of them they would drift. They were enslaved and captured and their Temple destroyed and kingdoms fell.
The twelve chosen Apostles and disciples formed the first Christian sect that were Jewish-Christians. This sect was initially formed by Yeshua while it was still the Old Covenant......The New Covenant started when he passed on the cross....So they followed a lot of the Jewish rules and customs.