Most everyone believes in the supernatural in one way or another, it is fundamental to human consciousness and culture.

Take for example this: "religious fairy tales" - now, perhaps your categorization of what is and is not a religious fairy tale is logically & epistemically perfect, but it is certainly not true of all people who say or believe such things, something I know from extensive experience conversing with atheists, scientific materialists, etc. I've also noticed that people have a tendency to judge the cognitive errors committed by those within their ingroup more charitably than those who are in their outgroups - not a particularly rational behavior, and plausibly a decent way to form incorrect beliefs, yet few have any interest in the phenomenon, especially sometimes.