So amongst all his other significant skills, WE is now qualified to give medical opinions, he knows the signs of mental illness.He may well turn out to have mental health issues. The signs are certainly there but the reality is we don’t know that, or what his politics are, or if whatever they are whether it was them which motivated him.
So there is no doubt at all here about only one thing! You are making assumptions.
The bold highlight is the risible irony of what he wrote following the para. in which he accused someone of making assumptions.
Plus ca change etc