I hate to make judgments without a mountain of evidence, but a cursory glance of their about page honestly made me think this person likely suffers from a multitude of mental health issues.

I think we can be accomodating of a wide array of diagnosable mental conditions in software. I'm thinking of Terry King's TempleOS, Ken Reitz's Requests.

Being upfront about it by authors dispels a lot of the potential tension and substantially changes the way we interact. I understand there may be a conflict and not everyone will want to advertise their diagnosis, but in my experience once it becomes clear that's what's going on, it helps all the parties involved.