Stupid things religious people say

[Sheldon]

Not sure I follow

I think it's the use of 'fairy story', maybe false equivalence (there is no atheist story) or non sequitur.

Exactly so. This sort of oxymoron is very much in vogue with religious apologists, Like Lane Craig's "I don't have enough faith to be an atheist". As if he's unaware that the primary dictionary definition of faith, differs from the definition of religious faith.