It's not just about density of population or guns, but the type of people. Wyoming's mostly all white. Few blacks, few muslims . Not racist, just facts of life here in America. I'm sure the diversity crowd will change all this if, heaven forbid, bill clinton's wife becomes president.
Wyoming's mostly white (as is Vermont) because neither has a history of either (1) slavery or (2) industrial expansion, which are the two factors that created significantly black populations. Two factors which, we might add, carry their own tensions with them when they arrive.
So trying to boil down to "what color people are" while completely ignoring the context that put them there is just dishonest at best and racist-baiting at worst.