Seriously, why do married with children, hard-working, sober, moral and upstanding Jewish Americans vote Democrat? I have my theory, but I'm not Jewish. I have been asked if I was going to do Aliyah while on the Kibbutz, but I didn't qualify.
Jews vote not much different from their urban neighbors.
As secular Jews move to the suburbs and and adopt the political views of their non-Jewish neighbors, they also lose their identity as Jews. That naturally leaves more identifiable Jews as libs than not.