How can a Jewish voter support ANY democrat!? The democrats are for abortion, a holocaust of the unborn.
Why does this surprise you, when the same pattern shows up so consistently?
Liberal democrats are the de facto national socialists in this country. Not Nazis, of course, but they potentially contain the next waiting storm. However Jews can tame this threat may be to their benefit, and one good way is by having a stake in their politics.
The worst thing they could do is not to participate, since they were always getting banned from things traditionally and then being shut out of the process.