Rural economies cannot support the nice houses, cars, jobs, shopping malls, and priviledge they see, and they feel left behind.
These same people also feel very intimidated by things they don't understand, and they don't understand much.
Thank you very much for this example of condescension. The way you dismiss over half the country — without, as is usual your kind, any attempts at citations — is really telling. Telling about you... At least, your erzats-deity managed to get some compassion into his condescension — you lack even that.
Me? I would take a country pumpkin over your kind of snobbish "I know, what's better for everybody else" asshole any day of the week. And twice on Shabbat.
It's a symbol of the red state/blue state divide. That's why you're sticking up for it, after all.
Oh, yes, a Ukrainian immigrant living in New Jersey is sticking for Confederate flag, because "he is left behind in a rural State". I've seen people making worse guesses than you just made — with all the aplomb customary to the above-mentioned snobbish assholes — but they are very rare indeed.
But, at least, even you admit, the flag is not "about slavery". I suppose, that's progress.