"they keep voting outside their best interests" (<--- supposition of knowing what their best interests even
are without having met or talked to them)
"you are underestimating how ingrained stupidity really is" (<--- assumes they're stupid because they work in coal or are poor or live in the country)
"why don't they vote in their own interests?"
Maybe it's because you call them stupid? The best about this election result is that it truly shows the disparity of morality between liberals (gaf) and other leftist philosophies and the more they throw a tantrum and shit on people the more they push people away (to the left).

If there's one thing that's true, it truly shows socialism/marxism as the more moral choice.