Isn't his accounting of things the reason you judge him as crazy in the first place? I would assume you aren't just taking your personal opinions, uncritically, from others'.

It's one way. Another is to simply observe his words and actions.

I started paying attention to him when he got sick. He seemed very reasonable about most things, and extremely insightful about many things. I certainly don’t think he deserved the posthumous label “crazy person.”

I started paying attention to him in the 90s and he was already crazy then. The only difference is that he was the fun kind of crazy, talking nonsense about quantum mechanics and such, rather than the disturbing racist crazy he became later on.

I read his one of his books in the 90s, in which he talked about how he believed in magic (specifically a rather hardline interpretation of https://en.wikipedia.org/wiki/Law_of_attraction_(New_Thought... via 'quantum' magic). He's been fairly out there for a while.

What book was that? All his books published prior to the 2000s were Dilbert compilations, so you might have the wrong date or the wrong person.

The Dilbert Future (1997), apparently (ref https://rationalwiki.org/wiki/Scott_Adams#Adams_knows_The_Se...)

Idk about the law of attraction, but I can say one thing for sure: if you don't believe in the law of attraction it will never come true