This, but unironically. For example, "antisemitism is the socialism of fools"[1]. People believing antisemitic conspiracy theories that purport to explain why their lives suck is very good at preventing them from learning about the actual political economy of why their lives suck. Everyone knowing the actual processes that create class oppression would make it possible to change things. So conspiracy theories are actually very useful for maintaining the status quo.

[1]: https://en.wikipedia.org/wiki/Antisemitism_is_the_socialism_...