The shooter wasn't fucked up originally, it's a long and winding road down the rabbithole of white supremacy and far-right extremism, and they all start with spewing the bullshit you just did. I went down that hole as a teen and got out, and you're sounding just like every other one of the good old boys I would talk with on white nationalist forums. Anyone can be radicalized, and anyone can be driven to kill given the right circumstances; it's not a unique trait.
What really causes shit like this is the breakdown of social systems, and the echo chambers of self-aggrandizement found within extremist communities. Broken and lonely people are easy targets, and once they find a 'purpose' they cling to it like a cliff edge, ready to let go at any moment, and especially when they can pull others down with them.
You've said some questionable things in the past Shadow, but the mask has truly come off here. You are a disgusting husk of a human being, and my only hope is that either time or circumstance can bring you back from the hole that you're sliding into.