It's common in certain types of polemic. People hold (or claim to hold) beliefs to signal group affiliation, and the more outlandishly improbable the beliefs become, the more effective they are as a signal.
It becomes a competition: Whoever professes beliefs which most strain credibility is the most loyal.
I think that most people who tell pollsters they believe conspiracy theories wouldn't bet on them.
Discussion of a book by "Dow Jones 36,000" Glassman". I'm wondering whether there are pundits who are so often wrong that their predictions are reliable indicators that something else (ideally the opposite) will happen.