I’ve seen this myself - so you could say this article confirms my bias. People who otherwise appear to be reasonable and intelligent - they are falling for what seem obviously untrue. But after doing research, and seeing the same ideas regurgitated in many places, it gives credence to the original idea.
This happens over and over again and I think people exacerbate the problem by then engaging in dialogue with other users, where they argue and become entrenched. Now their ego is tied to this position and changing course based on new information means admitting something they’d rather not . .