But the question is do we believe this guy is really someone with mental health issues.

I don't. He's on campus, probably an undergrad, so he's at some level intelligent.

What i do believe is he was likely brought up by people who probably loved him but treated him as an "every kid gets a trophy" child and never told my favorite and most magical word, "NO", as is the mantra of our day. He was also probably raised without much religious teaching and perhaps without strong bonds to an older generation and it's likely the school system "provided" those.

He isn't dealing with this loss or losing well. He is also doing what many secular progressives do in the attempt to remove any sort of deity from their life, they worship something else. He's devastated by the outcome, that his true version of social Justice could fail means that evil has won. That his candidate might not win and other people think different, a way that he sees as destructive or evil is problematic.

A psychologist could help him work through some of those issues but i don't think it was or is the only solution, and i certainly don't think meds are the answer, though I'd wager my house the first treatment proposed would be to play with those brain hormone levels.

I also don't think he's doomed to become some mall mass shooter, everyone makes a choice.