My generation had Satanic Panic. Parents feared that satan worshipers were ritually abusing children. The stories fed upon themselves. Psychologists got in the business of "recovered memories", now-discredited. Parents saw evidence where there was none, until there were more than ten thousand police reports of ritual abuse. They weren't substantiated.
The Salem witch trials were not an anomaly. We create an enemy in times of peace. We gravitate to a cause.
Is there a particular way this relates to current cause areas? Or wider EA? The linked article is paywalled so apologies if I've missed an obvious link :)