I think you should try to think for a bit here: The guy was on antipsychotics, he shot up a mall targeting random people, videos involve him shouting "IT'S NOT REAL", he has videos named "Quetiapine (his medication) doesn't work", and he's been examined since and been sentenced to holding in a psych ward.

Meanwhile, you have absolutely no evidence of any of your claims, but choose to believe him to be sane or misdiagnosed because of some inherent mistrust in psychiatry.

If you want to accuse anyone of ignoring facts to fit their narrative, start with yourself. You come across as incredibly arrogant by being so absolutely convinced you're right without a shred of evidence, and you're really just projecting your own experiences onto an event that's still extremely fresh and tragic to us.