Yes, but this is 4chan, so the odds aren't in OP's favor.

My understanding is there is not a single state with red flag laws that allow all weapons to be seized based on one person's word. Well other than a doctor giving a professional diagnosis.

For everyone else you have to have some evidence. Either multiple people witnessing threats/harassment video, or text based evidence.

Sure, but it isn't their side we read.

C'mon, he probably is leaving important details out, but "if people treat him badly, he must deserve it" is hardly fair.

In the hypothetical scenario that this is the whole truth, what you're doing is victim blaming.