Atheism has nothing to do with any fear of religion or religious practices. Atheists on the other hand can be motivated by any manner of factors. I don't get why you're making this so difficult.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'