Stefan Molyneux:I'm trying to figure out, though, why he shot up strangers...
Some potential ideas about that:
( 1 ) Strangers have been actively avoiding, or looking on indifferently, at his situation for his entire life. Perhaps he blamed them the most, since it would seem to him that they should have had the most compassion and the most capacity to do something to help him (since his parents and guardians were all hell-bent on brutalizing him, getting angry at them wouldn't do much good). An analogy: if you're attacked by an insane rabid dog, and every passer-by just ignores or stares on while it's happening, your anger is going to be mostly with them, and not with the dog, I would think.
( 2 ) Perhaps this was his way of destroying the world, before he destroyed himself? Killing strangers is sort of like taking a stab at the anonymous "whole world"...