That might well be part of it, but I think there's a more potent factor at play: not recognizing other people as people. Increasingly, we each see others as ene

That might well be part of it, but I think there's a more potent factor at play: not recognizing other people as people. Increasingly, we each see others as enemies, demons, or at best means to an end. It doesn't matter whether the "end" is a political point, some other kind of point, scoring some fame/karma, or working out something more personal. The impulse is the same. To shooters it's still just shooting meat puppets, not people. The obvious political leanings of most mass shooters merely reflect who has more guns or access to guns, not who has dissociated more.