They have a separate culture away from Cacs
They are a small group and exclusive rather than inclusive like Islam and Christianity <------- Both of these factors plus always being outsiders since their dispersal from Jerusalem means they have tended to stick together. Don't underestimate the power of unity. Just watch Curb Your Enthusiasm to see how Jews operate
. Larry goes to Jewish country club, works with all Jews on shows, has a Jewish doctor, Jewish dentist, Jewish manager, Jewish lawyer (fired his gentile lawyer after he found out he wasn't Jewish. His name was Berg because he was Swedish lol. Larry told him
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Lastly, they put a great emphasis on education. Jews have always been a literate group in a world of illiteracy going back to Roman times. A lot of intellectuals in history are #Jewishexcellence