There's nothing to understand. Its the block mentality moron vote, just like the black vote. Both side with Democraps. Democraps are the instigators of racism, anti semitism, the Klan and support everything Israel is against. Both together are a large voting block....an incredible stupid voting block. Its like being black for the Klan and Jews for Nazi's!
Because we live in America most of what we do is still relatively unregulated ... at least compared to the rest of the world. So people still go around their everyday lives thinking more about what they and their families and their friends and their companies can do to better their lives.
Candidates and parties are still viewed as these abstract figures floating in the distance that may or may not have some real impact on their lives.
So people continue to vote, not their pocketbooks, but their guts as to who they feel more comfortable having a beer with.
City folks prefer seemingly erudite and urban Democrats.
It would be interesting to compare the votes of urban Jews, to suburban Jews, to rural Jews and see if there is any difference in voting patterns.