"Atheists know more about what's in the majority religion's holy book than its believers do."
-- Atheist saying (which, based on several studies and polls is actually factually accurate)
Fun fact: The saying dates back to at least the 1100s, as it can be found in a poem by Omar Khayyam:
"The Koran! well, come put me to the test Lovely old book in hideous error drest. Believe me, I can quote the Koran too, The unbeliever knows his Koran best.
And do you think that unto such as you, A maggot-minded, starved, fanatic crew, God gave the Secret, and denied it me? Well, well, what matters it! believe that too."