Bloody hell, there is a conspiracy of conspiracy theorists!
But yes, there are so many weird beliefs that get lumped together. And if you are vulnerable to one weird belief, you'll probably be vulnerable to many. The podcast Tricolour linked to mentioned the Tradwives movement, which is ostensibly just a social group for women who want to be better wives and mothers. But of course it hates feminists, and makes you feel bad if you aren't good at keeping a perfect house. And it is pretty tolerant of racism etc. The podcast said that people joined these weird groups because of unmet emotional needs, but found that being part of the group didn't satisfy those needs. Then rather than get out, people went deeper down the rabbit hole, hoping that somewhere down there they'd find what they needed.
The internet has just made it easier to join cults.