One example of how superstitious previous generations were can be seen by the reasons for which they killed people.
Historians estimate that between the 14th and 17th centuries 50,000 to 600,000 Europeans were killed because of accusations of witchcraft. (In contrast, the death toll for the 9/11 bombings, which caused a whole nation to awaken for war, was under 3,000). (1, 2)
Often these “witches” were accused merely because they were strange people, had heretical views, or unusual birthmarks and then eagerly burned/drowned by the local Christian community.