This is typical of believer bigotry. “Survival of the fittest” has nothing to do with belief or disbelief in a God. Nor .. as I think Carson is trying to imply .. is there some ethical imperative atheists derive from knowledge of evolution.
Dr. Carson may get his ethics from his religion .. that is also true of the Jihadist in Syria, the terrorists who plagued Belfast, and the slavers who preached to Dr. Carson’s ancestors on some plantation.