Listen to this orthodox Jewish rabbi yourself. He very clearly explains how a covenant was made with a group of people, making this group of people “the Jews”. He describes that any group of people on earth could have been the original covenant people and to this day anybody can become Jewish. It’s not a bloodline, it’s not an ethnicity but yes it is an old global religion found in nearly every nation on the planet.

https://www.youtube.com/watch?app=desktop&v=sFyIMNq-nlk