[Stultis]

all such ideologies, built up as they are on the concepts of racism and statist totalitarian aggression and control, are direct products of the Darwinian doctrines of struggle for existence and survival of the fittest

Hitler never cited evolution as a reason for the fascist state, or in reciting the flaws of liberalism and the liberal state. Never. And the fact of the matter is that Hitler seldom mentioned evolution in connection with Nazi race theory or antisemitism, nor did other important Nazi race theorists such as Alfred Rosenberg.

When Hitler and other Nazis did cite evolution it was usually (and in superficial and facile fashion) in connection with militarism, and justifying the desirability of strife and struggle. And this was not a Nazi innovation. German leaders and generals made the same connection before and during WWI.

[Restorer]

"Nature herself in times of great poverty or bad climatic conditions, as well as poor harvest, intervenes to restrict the increase of population of certain countries or races; this, to be sure, by a method as wise as it is ruthless. She diminishes, not the power of procreation as such, but the conservation of the procreated, by exposing them to hard trials and deprivations with the result that all those who are less strong and less healthy are forced back into the womb of the eternal unknown. Those whom she permits to survive the inclemency of existence are a thousandfold tested, hardened, and well adapted to procreate in turn, in order that the process of thoroughgoing selection may begin again from the beginning. By thus brutally proceeding against the individual and immediately calling him back to herself as soon as he shows himself unequal to the storm of life, she keeps the race and species strong, in fact, raises them to the highest accomplishments." Mein Kampf

This certainly appears to be an attempt to apply Darwin's theory of natural selection to Man and more precisely to human races, which Hitler appears to have viewed as more like species. (Which of course just points up his misunderstanding of biology.)