No offense, but your argument about number of Jews in Congress is a strawman, and quite stupid. You don't think that the Republican party ran Jewish candidates in places like New York against, well you guessed it, Democratic Jewish candidates? And what is the result of a pro-life conservative Jewish Republican facing a progressive Jewish candidate who supports abortion on demand and impeaching Trump in NYC? Probably the same as the Muslim Republican who challenged Ilhan Omar. But aghast, I cannot believe that neither Senator from Wyoming is Jewish. By chance did Wyoming Democrats nominate a Jewish candidate?
The Democratic party establishment has been doing a delicate dance with the anti-Jewish faction for several years. Leftist academia that they love for creating child robots to pull the lever and protest on the street and keep conservative speakers off campus unfortunately push identarian victimhood politics (i.e. Marxism) And in their eyes Israel is a colonizing oppressor. You can see it in the rhetoric of protests held on campus. The signs. The chants. Check out some footage from UW-Madison. Interesting gathering. Or the statements from the Chicago Democratic Socialist Caucus of the Chicago City Council.
But if you don't believe me just check out the results of the annual Gallup poll. And given the trend of the youth of the party these numbers dont get better for your argument.
https://news.gallup.com/poll/472070/democrats-sympathies-middle-east-shift-palestinians.aspx