The logic to make such a claim is so ridiculous you might just was well say that Darwin, Dawkins and everyone else in the evolutionary camp are also creationists.
Hitler made some worthless PR statements that he spent the rest of his life ignoring and contradicting. When an atheists cites these PR moments to the exclusion of his actions and his own worldview as expressed in works like Mein Kampf, they are not being honest with themselves.
Hitler was not being obedient to any creationary scripture (Jewish/Christian/Muslim/Mormon, whatever), and was in fact engaged in actions quite contrary to every creationary religion we could think of. Rather than acknowledging a divine moral code he based his life on the Darwinian moral code of survival of the fittest, and applied those ideas more consistently than almost anyone else in history.
Modern evolutionists are terribly inconsistent. They talk about successful reproduction proving fitness as the core of natural selection theory, but abort and don't have kids. They deny a God who is the source of the standard of good and evil, but are tirelessly proclaiming their self-righteousness and how evil/sinful their opposition is. They believe populations divide over time with less fit populations being destroyed in competition with more fit populations, but decry the racism that is inherent to the evolutionary viewpoint, and on and on.
They claim to believe in evolution, but are forced to fall back on a creationary foundation just to live an even semi-coherent thought life. Good and evil, justice and injustice, purpose in life, these are all things that can only be found in the creationary worldview. (God + evolution just gets you a demonic Baal type figure, if you are consistent about your theodicy.)
In C.S. Lewis’ 2nd book of the Space Trilogy, Lewis portrayed the villians, as they descended deeper into villiany, not as being more and more sophisticated in their evil, but descending into muttering, driveling, ranting. I’ve often observed, how the reaction of evolutionists when their core religious beliefs are undermined is remarkably similar. (For evidence, see above.)
Atheists are always on the attack, because they have no defenses.