Interesting. I should have read the whole thing before responding the first time. I've heard of these psychic parasites, and wouldn't be surprised if they're on everyone. Tying it to the physical phenomenon of a cult is probably correct too - there's a correspondence between physical and spiritual action. Idk more than simply that there's a correspondence. For clarity, a correspondence is a catchall term for a clear link between events and events, or events and images, which is not causative.

Speaking of causative... The meth caused the vision of the parasite? Was it revealing the parasite or inviting it? When it scuttled off, did it leave entirely or only leave your awareness?

Anyways, I have no experience with those things. I just think you know when a vision is showing something you need to see.

Totally agree about cult mentality. This mentality is the same urge that gives rise to socialism. It's a mass surrender, where the surrender of reason of nearby people gives your own surrender validation, which amplifies and becomes a religious fervor. Removing religion doesn't stop the phenomenon - it might even make it more likely. But with religion, you can see it in the repeated "revivals" of Protestant sects. Only falsehoods require revivals. Truth remains, no matter what people believe, so if belief requires revival and goes in the direction of fervor, which short circuits the application of rationality, then that sect is false.