The belief that the universe is just the creation of an extra-dimensional alien. This was his mid-term project for his 3rd grade quantum universal creation class, and he got an F on it. (One of the requirements was for the people inside not to kill each other worshiping him.)
Person A: If god is so all-knowing, why do we all kill each other in wars?
Person B: Because god is just a D-average alien. I propose that we turn against him and find a way to pilot a ship outside of the universe and into his eye. Hopefully, he has allergies and we'll cause him great discomfort.
Person C: Can we make him sneeze with tactical nukes?
Person B: Sure! Why not?
Person C: FAILISM FTW!