He's not just trolling, that's for sure. Often he posts a mix of real content, with nonsensical God quotes in the middle of it. And he doesn't even bother about the hellban, he just keeps posting in the same accounts and has been for years.

Isn't that what a real troll would do? I mean , how do we know that the guy posting the weird comments is the same person who wrote the OS?

Did you look at his site? There is stuff on there just as crazy as the stuff he posts here. The simpler explanation is that he is genuinely not well, not that somebody is pretending to be him and faking it.

Maybe, or maybe he's just a guy with a strange sense of humour. One can never tell on the internet.

He himself has admitted he's schizophrenic. You'll also notice that he continues to post on Hacker News, despite being hellbanned, and seemingly knowing that he's hellbanned. if you read said comments, it's difficult to believe they stem from a strange sense of humour.

I believe he's actually been diagnosed with very serious mental illness.