As for rural voters... they have no national platform, with both parties disengaged. It's really a battle between the city and the suburbs.
[1] "New York Values" is a pejorative yet "Small Town Values" denotes virtue.
It's actually about values: guns, abortion, God, gays...
Jewishness is but a teeny tiny part of that, and this mostly because of things that aren't directly related to the faith. We don't see too many Jews protesting outside abortion clinics and complaining about gay marriage.
Certainly there has been mismanagement of the city of Detroit, sometimes on an absurd and possibly criminal scale. But, to chalk it all of to "Democrats did this" is...well, it leaves a whole lot of the story out.
Note that I'm not a Democrat and not defending politicians in any general case. But, I do think it's silly to make the claim that local Democrats caused Detroit's decline, when there are clearly so many other factors in the story.
Not to say that the automakers weren't also badly run -- they were. There's an NPR piece about NUMMI that puts some great color on the situation -- ah, here it is [0]. See especially "Act Two", where GM completely muffs bringing the NUMMI success to the rest of the company.
[0] http://www.thisamericanlife.org/radio-archives/episode/561/t...
That's true, because if mismanagement caused a city to collapse, then San Francisco would be a ghost town by now. There are stinky things in city hall.