'Darwinism'

I hope it's obvious, but for those who don't get it it: This isn't an attack on evolution or atheism, i'm trying to point out the ridiculousness of the assertion by certain theists that there is some sort of ulterior motive for athiesm; that it's a kind of religion.
It isn't.
Atheism is simply a lack of belief in things untestable and unpercievable.