Ah crud, I messed up on the size of the circles in the first panel.
Anyways, why can't most Religious people and Atheists just get along? Cuz of the fanatics of both side of course. Religious fanatics think they're superior, and Hardcore Atheists think they're superior. Imagine if those kinds of people didn't exist.
As for the other panel above, I know there's always conflict between the groups, but I've mostly seen Religious people vs Atheists.