"In God we trust" ... not. Power is what you should worship, whether it is cars, money or guns. Power can solve all your problems. America has granted the individual the illusion of personal sovereignty in the full knowledge they can no more exercise it than fly to the moon.
So there are lots of guns, and the cop gangs carry lots more guns just in case. But in practice there's no "just in case" and SOP is to go in with maximum suppressive cover.
It's no surprise stuff like this happens given the parameters the system has been setup with. And there's no easy way back, because of grass-roots indoctrination of the *illusion*. Stupidity and aggression are easy bedfellows.