That's the fundamental fallacy of the creationists. Evolutionary theory is not atheistic. Indeed, many of us practicing Christians are both Christian and scientists, namely we believe in the overwhelming evidence of evolution.
But, the canonical attack of the creationists is that everyone who disagrees with them is an atheist. (And you say you don't believe in ad hominen attacks)
I can only laugh at this.
That is just flat out FALSE! Tell that to Thomas Huxley (and his progeny), Gould, Crick, and almost any other renowned darwinist or materialist or naturalist (as opposed to SUPER-naturalist) who ever lived. Not only so, but Stalin, Hitler, Nietzsche, Mao Tse Tung, Castro, Pol Pot and all the other atheistic mass murderers who ever lived also believed it was a godless process.