Just today I was thinking about the overwhelming support of American Jewish voters for the Democrats and wondering about the reason. I came to the same conclusion you did. I'd be curious to hear from anyone with a different opinion.
JINO's!
I have a different opinion. I've known quite a few liberal Jews, most all of them support Israel, often with donations. They also vote Democrat. I think the Jewish tradtion of cherishing leftism causes them to simply overlook leftist antisemitism.
Many I know are still stuck in the 1930 - 1975 meme that equates (wrongly) the Democrat Party with Civil Rights ergo, they are felt to be some sort of guaranty against Nazism. They have fallen hook line and sinker for the smear of GOPers as being "fascists." There is a sad aspect of American culture, that is a result of the Great Depression. That aspect is a permanent far left group, who are very antagonistic toward big business and toward traditional society. We can thank FDR for that.