You seriously live in a bubble dude. Seriously, look at where Jews live in states like California, Florida, Illinois and Maryland. Where I live there's probably more Jews in my district and St. Paul's than the rest of the state combined despite those being only 1/4th of the state.
Oh and there is obviously no shortage of liberal Jews in NYC.
Where are the heavily Jewish rural areas? The few Jews who did live in rural areas probably moved there and came from a more urban and liberal background and probably brought their voting habits with them. I have a feeling though that Jews who lives in exurbs are significantly more Republican than Jews in general since they would move to the exurbs for the same reasons non-Jewish whites do (caring more about owning a big house than having a sane commute to work or good culture and amenities around, and fear of minorities.)
California actually tracks "Jewish" as an ethnicity for voter registration reasons, and your intuitions are correct. Granted, California hardly has tons of hyper-ethnic Jews, but Jews in heavily Republican areas tend to lean Republican -- less so, but the heavily Dem tilt of Jews would be significant reduced were their distributions reflective of the urban/suburban/exurban/rural make-up of the U.S. as a whole.
I'm not sure whether the orthodox Jews really compensate for this nationwide effect. I'm also not sure how the hell to characterize the places they live on the urban/suburban scale...
What kind of causation are we assuming here?
