Harris proved that, you don’t pick your adversary or enemy to be your partner. Jews are anti-Harris/anti-Biden/anti-communism/anti-stupidity. That is except when so many Jews continue to vote for democrats against their own best interests; stupidity to the max.
Harris is married to a Jew. Jews (the majority) helped put Biden in office. Most Jews vote democrat and support socialist values.
I would agree with Fetterman's assessment. Shapiro was dropped because he was seen as outshining Harris and he has political ambitions that could cause division in a Harris/Shapiro administration. I don't think Josh being Jewish was the deciding factor in him not being picked - MHO.