Madness of the crowds. It's also interesting that this phrase brings only search results from Douglas Murray, who has been widely attacked as far right (and thus untouchable). The social and psychological effect is much more meaningful and important.

https://ncase.me/crowds/

To be clear I don't oppose to what is being said. I'm opposed to how it's being said. If there's only one allowed dogma, there's no chance of correcting the course and logically it will always end in a disaster.