Formaldehyde
Both Fair And Balanced
Or perhaps they remember who were blatantly anti-Semitic not all that long ago. And what parallels there are towards those who are racist, Islamophobic, and openly hostile towards Latinos and most any other minority.I think a lot of Jewish Americans are stealthily atheistic/agnostic. This alone would explain antipathy towards the Republicans.
Most American Jews are quite socially liberal whether they are observant or not. They know what it is like to be persecuted and discriminated against.