My favorite part is 53 minutes in when Patricia Steere almost has a moment of clarity when talking about how people are spreading conspiracies against her.
"I wonder if in their hearts, people who do that know their lying."
"Or, are they so conspiratorial that they actually believe it?"
"Then it makes me worry about maybe things I believe in."
"Am I like another version of them?"
"But I know I'm not."
You can see her struggling.
We all have the ability to self-deceive, to lie to ourselves. We have all be in bad situations where we refuse to accept the truth about something painful, and are in denial. You even know it, deep down.
But when it becomes the shape of the earth, that's a bit over the edge, so to speak. Now you are not just denying that "No, I totally don't have a drinking problem" to "The entire world is a vast conspiracy and a lie".
Flat Earth is basically a religion the way I see it. I've seen so many flat earthers argue facts and facts and then occasionally slip and rant about how no,they aren't a tiny spec in a vast cosmos, yelling We MATTER and We are the center of it all! Existential fear can be a big motivator.
So yes, there are some literally insane people here, but also some very smart and very deluded people too. Even if it's only self-delusion.