There is no Santa Claus, Tooth Fairy or Underpants Gnomes ... because it's something people made up. There is no evidence they exist.

Lets go a step further.

People used to believe sacrificing a humans appeased their Gods and made the harvest good.

People used to believe (and still do in some parts of Africa) that witches were among them.

People used to believe Left Handed people were sinners and should be killed (Catholic Church).

And another example, just to show that I'm not harping on Religion rather than blind belief:
The Communist Atheist used to believe the root of all problems were from Religion and free markets / upper classes.


People make things up that ARE NOT TRUE, and follow it with a blind zealotry. No matter their belief system.

Read Lord of the Flies, Jack the leader is fanatcism. Piggy and his glasses are reason, science, skepticism.

Couldn't the same be true for people's idea about God?