God this is so fucking stupid it makes my head hurt. The reason this shit happens in suburbia SO INFREQUENTLY is BECAUSE of parenting, et al. But the key measurement is ratio...
Walk down a street in Detroit or Compton, instead of one guy willing to shoot 27, there are 27 all willing to shoot one or more. That's empathy? Do the fucking math. Run the odds.
That's LACK of guidance, fucko. When humans make up their own moral code, that's usually the outcome.
But here's the dealio: As fucked up as this kid's parents might have been, he was obviously well and expensively educated and exposed to other options, and he CHOSE to do this. As an Adult.
Some people are just bent, mate. This dude was fucking seriously Bent.
And there is absolutely no defense against that. You just gotta be ready. Like a trained educator with a fucking glock in a class 2 holster under her fucking blouse.