Any book by Jerry Bergman is a must read. He is an expert on the linkages, indeed the bedrock foundation, given by Darwinism, to such creeds as Nazism and its kin, Communism. An example of the clarity of his writing is here. Books by Bergman, that one must read are given here and here.

Darwinism is the foundation stone of Communism and Atheism. It gives a fraudulent 'scientific' gloss to materialist theology and communal fascism, be it the Hitlerian, Stalinist, Mao or uber-state variety.

The state as God, replacing a creator, uses Darwinist theology as a 'scientific' rationale for its omnipotence. Murdering humans who are just pond-scum, is thus a moral duty if they are inferior, defective, naturally 'unfit', 'eaters' [as the Nazis called the old], drunk, drug addicted, Jewish, Catholic, or sexually confused. Hitler's Jihad against Jews [6 million dead], Catholics [5 million gassed], gypsy's, Slavs, and non Aryans was based on Darwinian selection.

Bergman:

“Darwinism as a worldview was a critical factor, not only in influencing the development of Nazism, but also in the rise of communism and the communist holocaust that, by one estimate, took the lives of more than 100 million persons [Courtois, S., Werth, N., Panne, J-L., Paczkowski, A., Bartosek, K. and Margolin, J-L., The Black Book of Communism; Crimes, Terror, Repression, Harvard University Press, Cambridge, p. 4, 1999]. Marx, together with his forebears, associates and successors, was a doctrinaire evolutionist who tried to build his society on evolutionary premises. There is abundant documentation of this assessment and, few would even question it. [Morris, H., That Their Words May be Used Against Them, Master Books, Forrest, p. 417, 1997]”

Beate Wilder-Smith suggested that evolution is

“a central plank in Marxist doctrine today. The Nazis were convinced, as are communists today, that evolution had taken place, that all biology had evolved spontaneously upward, and that in between links (or less evolved types) should be actively eradicated. They believed that natural selection could and should be actively aided, and therefore instituted political measures to eradicate the handicapped, the Jews, and the blacks, whom they considered as ‘underdeveloped’.” [Wilder-Smith, B., The Day Nazi Germany Died, Master Books, San Diego, p. 27, 1982]

The State uber alles and as God. Control, manage, kill the human if necessary. The state always seeks to destroy or totally control its opposition; the family, business, money, banks, the Church.....When a creator God is part of the cultural milieu it is a direct threat to state power. Rome evinced this basic principle, trying for 250 years to crush the Church through persecution – a sporadic effort but also at times concerted and steeped in blood. The power of the state today is no different and certainly no less corrupt and immoral than in the Roman era. Today the state funds Darwinist theology and cant as 'science'. Even opposing Evolution will result in your being branded a 'creationist', a 'denier', an unscientific lunatic. The state has every interest to saturate its citizen-knaves with the belief that humans are animals, and the state is the only power of civilization, protection, security, reason and science.

Bergman:

“Darwin, however, opened the door to Marxism by providing what Marx believed was a ‘scientific’ rationale to deny Creation and, by extension, to deny God. [Perloff, [J., Tornado in a Junkyard, Refuge Books, Arlington, p. 244, 1999]. His denial of God, and his knowledge of Darwin, inspired Marx to develop his new godless worldview now known as communism. And like other Darwinists, Marx stressed that his communistic worldview was ‘scientific’ and, as such, employed a ‘scientific methodology and scientific outlook’. [Kolman, E., Marx and Darwin, The Labour Monthly 13(11):702-705, p. 705, 1931]. Bethell notes that Marx admired Darwin’s book,

“not for economic reasons but for the more fundamental one that Darwin’s universe was purely materialistic, and the explication of it no longer involved any reference to unobservable, nonmaterial causes outside or ‘beyond’ it. In that important respect, Darwin and Marx were truly comrades … ” [Bethell, T., Burning Darwin to save Marx, Harpers Magazine, p. 37, December 1978]

Darwin and Marx inextricably linked and joined in their communal assault on the human, on reason, on faith and on civilization. See here for JS Conway's excellent book on the destruction of the Churches in Nazi Germany by the Hitlerian Atheists and Evolutionists.