The thing that I don’t understand about these folks is they’re all obsessed with “doing their own research” but so often fail to actually do any, and what they end up doing is “reinforcing their belief”
The ability to cherry pick which bits of their “research” they believe and which bits they choose to ignore, belittle and rubbish is also a requirement. And often it’s a euphemism for going off down a rabbit hole of conspiracy bollocks, watching all that and taking it on board but then ignoring the opposing view completely. It’s very easy to do if you simply state that anyone with an opposing view is “in on it” or “one of Them”.
SciManDan on YouTube is very good at debunking flat earthers, space deniers, moon landing hoaxers etc. It’s amazing how many of them can believe very selective bits that fit their narrative but then rubbish the rest, even when it comes from the same source, sometimes even the same article.