Yeah you can go and read what was in the buffalo shooters head though which is a thing. He's pretty much a schizo christchurch copy cat. Amusingly he seems mostly in favor of shootings since it intensifies the gun control debate and accelerate the schism in the united states.

Gun control is not going to fix this kind of radicalism or its impact. The dude was a straight up terrorist and IMO he made the correct observation that this sort of terrorism will be successful in driving the divide and creating more extremism.