Yes. The link to Mass hallucination goes to the page on mass hysteria. Not quite the same. Are there any actual verified cases of mass hallucinations?
It's kinda funny how religious nuts, or those that support religious nuts, will have a tendency of ignoring everything else and focus the one thing they might actually have a point in, and then use that to justify ludicrous claims such as "demons exist!"
Okay, I'll admit, I'm having trouble digging up with anything that supports "mass hallucinations" (not sure what you define that as anyways... apparently it's not a group of people that can show symptoms of a disease without actually having one...)
But it doesn't matter. Other things influence believe in demons and the supernatural.
Personal hallucination (are you going to suggest that they don't exist?),
Bandwagon Effect,
Hysteria (and mass hysteria), and
Groupthink.
And like I said before, just because different cultures hold a concept, does not make that concept true. Multiple groups thought the sun revolved around the Earth. Does that make them right?
Answer:
No.
Occam's Razor is on my side here. What's more plausible? That there are demons, spiritual things, an astral plane, and all sorts of ghosts and goblins that can't be measured or observed by
ANY instrument known to man...
...Or that maybe, just maybe, sleep paralysis, personal hallucination, groupthink, and a species that has an amazing track record of getting most things about the universe
wrong when they first guess about things, managed to believe in similar things?
I'd also want to add that it's amazing how many cultures believe in the supernatural, when this supposed supernatural is completely undetectable except for some random, chaotic method that seems indistinguishable from hallucination. And, I might add, seems to get the appearance thing wrong. Japanese Oni do not look the same as Christian Demons. And... ironically... all of these supernatural and
inhuman things, often look much like humans. Just like aliens tend to look humanoid. And just like gods tend to look humanoid. Hmm........... wonder why?
And those that don't look like humans, either represent elements here on Earth that we're all familiar with (fire, water, earth, air, the sun, etc.) but yet, surprisingly, never quasars, distant objects, pulsars, or "Dark Matter" (whatever that stuff is, if it is stuff). Or they tend to represent animals on Earth. Or they're a mix; a man made of fire, a man with the scales of a snake, or a man with fur, or a woman with fur, or a man with claws.
Hardly impressive for supposedly non-Earthly inhuman, non-normal creatures. I've seen weirder things in biology textbooks than I've
ever seen in mythology... and many of these weird discoveries that seem unlike anything we've ever even imagined, are things that humans were never even capable of experiencing.
Hmmm......... makes you think. Unless you're a woo, that is.