@Florence: He legit does have mental health issues. It's well documented for many years. Because he's espousing hateful politics and being generally awful and having around Nazis doesn't mean he's not mentally ill but just an asshole/villain.
Alas, there hasn't been a shortage of genuinely mentally ill people who were violent and/or conspiracy theorists and/or even Nazis or sympathetic to them. Not everyone who is mentally ill is nice.