It's not stupidity for everyone, it's just that every recourse outside of violence has been captured or gamed by those truly in power in the US. Plus the media has been captured 99.9999 percent.
And it's not bad enough for the US public to support violence, plus violence would be futile anyway against the military, no matter the number of private firearms. The elite are just waiting for enough automation in society so they can "cull" the masses they consider worthless.