If you want some interesting insight into the mind of a young spree killer look up Randy Stair. He wanted to shoot up his school but ended up choosing his workplace instead. The tl;dr in my opinion is neoliberal late capitalism turning people lose. Young people are staring down the barrel of income inequality that surpasses the gilded age, in a crumbling hollowed empire, with older generations who simply do not care, and the looming threat of climate apocalypse always present in the air.

I'm using he as his pronouns because I don't think he ever stated what his preferred were. Someone can correct me on that?