Many Jews are socialists and marxists. They think(and are probably right) that they can control the Rats just as well or better than the GOP. Remember, that although Israel is a democracy it has deep roots in socialism. That has mostly worn off, but the political leaning is still there.
Many?
Probably most.
Or, at least, the overwhelming majority.
Don’t forget that Marx, Engels, Trotsky, Fuchs, and the Rosenbergs weren’t Presbyterians, either.