Mine is SsethTzeentach Youtube videos. Yes, he's an edgelord and yes some of his delivery is chanlord jargon that didn't age well and should be allowed to die, but he often explores games I never thought about before and often presents them in ways that are, in spite of the edgy gloss over everything, clever and funny to me.
I said it before and I'll say it again: it's possible to enjoy something while also accepting criticism of it. With that in mind, SsethTzeentach is my pick for my problematic favorite.
https://youtu.be/4Ow5lGFju1c
Not besides the official story, no. Based on just looking for a motive, I'd have a hard time believing it was anything than what supposedly happened, because why would anyone who's not a deranged cult leader just want to kill a bunch of people like that. I would be curious to see what's out there, though.
As for CIA ties to cults, though, the case of The Finders has a lot of pretty strange connections that I think are worth more scrutiny...