Bipolar I won’t make you into a Nazi but the manic episodes are much more extreme than the hypo-manic episodes people with Bipolar II tend to get, and for some reason that often gets lost in the discourse. It doesn’t excuse him at all, but I do want to make it clear that these sort of delusions - as in grand conspiracies, not Nazi shit - are common during manic episodes.

I think in this case the simplest explanation is the correct one: Kanye stopped taking his meds and spent too much time on 4chan. Since most celebrities are emotionally stunted adults, it’s no surprise that many of them fall into the same cultural demographic as teenage boys.