It is very clear that this individual was an absolute nutcase with mental problems.
This is not only clear from his previous comments that document his narcissism. Here is additional evidence.
Please consider all of these statements from him
Exactly. This wasn't someone created by the WTS. This is someone that likely latched on to them because of his delusions. I've seen tweets that show how desperate some exJWs are to use any tragedy to put some blame on the WTS but it appears they had the misfortune to attract one more nutcase but had the sense to kick the idiot out.
Unfortunately, the police failed. He clearly had no business having a weapon. If only he'd committed a real crime such as misgendering someone or suggesting that Covid came from China, they may have saved some lives.
Nothing the WTS does could ever justify firing a weapon into a crowd of strangers. Anyone suggesting there is somehow some reason that justifies such a thing is a vile idiot who needs to sit down and have a long think about how and why they have lost the plot. Don't be blinding by hatred or desire for petty revenge. Don't think that JWs are your enemy.
Years ago it could have been YOU sat in that room. Would you deserve to be shot?