While there is no single cause for Athephobia, scientistsbelieve that the main two causes are, Don't want to realize the truth and because they mommy taught them not to talk to an atheist.
Secret atheist: It's so great we have so many religious people here.
Realest christian ever: Yup, you realize you don't have to say religious people, just say christian.
Secret atheist: Oh yeah, yeah, also you know I'm a atheist right.
Realest christian ever: *runs*
Secret Atheist: FUCK SAKES CAN I HAVE SOMEONE THAT DOESN'T HAVE ATHEPHOBIA.