Better for showing the proportion of each party identifying with certain religious groups, but not for showing the proportion of each religious group identifying with each party :P

Any idea why Jewish people are more predominantly Democrat than Republican?

Not really, but if I had to speculate, maybe it’s an urban/suburban/rural divide? Or simply the fact that Republicans spend more effort targeting evangelical christians while Democrats don’t focus as much on religion. Or the tendency for antisemitism and other forms of bigotry to go hand-in-hand with conservatism. If you find any research about it, I’d be interested to see.