:an idiosyncratic belief or impression that is firmly maintained despite being contradicted by what is generally accepted as reality or rational argument. Just like Santa Clause, and what did Santa teach us, that millions can all believe in the same thing and all be wrong.
By definition religion is also a superstition,
:excessively credulous belief in and reverence for supernatural beings.
:a widely held but unjustified belief in supernatural causation leading to certain consequences of an action or event, or a practice based on such a belief.
They are true, because humanity has decide that they are true. This is perfectly logical. I fully believe in a big man who controls everything and man being created from dust. This is the sort of thing that just makes sense. We say they are true, so they are. This is why they are true. I hope you know what sarcasm is.