Another data point for that thesis: Arabs are very into what we would call conspiracy theories. A decade ago there were all these polls showing fairly broad approval among Arabs for Osama Bin Laden. That makes sense when you consider other polls showing that most Arabs didn't think Bin Laden was involved in 9/11 [0].
Personally I have a soft spot for conspiracy theorists. At least Alex Jones is thinking for himself. Glenn Greenwald and Matt Taibbi are on HN a lot and I feel similarly about them -- which is not to say I put them in the same category as Jones. I think they get some stuff right, I appreciate their fire-and-brimstone approach (at least it's fun to read), but both of them frequently write sentences that cause my eyes to roll back in my head.
I think the ultimate source of conspiratorial thinking is linked to reductio ad absurdum. In our minds, we seem drawn to the extremes. Everything reminds everyone of Hitler, Stalin, Maoist struggle sessions, and so on. Trump is a vile white-supremacist-fascist. Biden is kowtowing to critical-theory-reading neo-Marxists. Reducing an argument to the absurd makes sense in logic and math but perhaps not in the real world where there's no guarantee that an argument is based on anything logical.
Or maybe it makes sense in the real world too. It seems to me, sometimes, that conspiracy theorists are actually fairly good at identifying the ultimate goal of an ideology. But ultimate goals are ideals, they're never realized and, in practice, they provide a direction rather than a destination. It's one thing to identify the ultimate goal of the ideology animating leftists but are you so sure our society shouldn't be a little more left-wing? Because, in practice, that's what electing the left-wing candidate is likely to accomplish. It's unlikely to recreate The Cultural Revolution.
On the other hand, maybe the fact that such ultimate goals came astonishingly close to being realized, on the right and left, in the 20th century, is a good reason to be alarmed.
[0] - https://newrepublic.com/article/94546/middle-east-radical-co...