*L*E*G*A*C*Y*
Done.
People can write all these explanations and experiences for social anxiety but 99% of those people never planned on going Rambo on some college students and stabbing a bunch of their roommates.
Exactly...at the end of the day...dude was sooooo into himself he didn't care about the value of human life in general. Which is why he saw no problem doing what he did.