“My point......... how can Jews remain in a party that is so antisemetic?”
Having just come from High Holiday services at a Reformed Temple, and having heard the Rabbi trash the religious right for being pro-life, I think that it is abortion that is the glue that holds the Democrats together, in spite of any other intra-party disagreements.
Abortion and tradition. The latter is a powerful force. Heck, there are even some holdouts among conservative Southerners who still vote Democrat. ...as was their tradition for two centuries before the Reagan Revolution put the brakes on it. Tough spell to break.
As for abortion, the loyalty to the pro-abort cause among many has become irrational. ...almost cultish. I asked a Dem-voting (Jewish) buddy of mine fairly recently why he votes Democrat when he advocates low-taxes, low-spending, strong defense, etc. ...and he's pro-gun. The answer: "Uh well, I, uh.....ABORTION!" I laughed and asked him if he would really care if abortion laws were kicked back to the states, which in effect would happen if Roe v. Wade were overturned. He then cut the conversation short, knowing I had him backed into a corner.
Tradition and brainwashing.