That's fine, but the people who were and are in favor of eugenics and the Holocaust definitely pointed back to Darwinism as part of the justification of their ideas.
To the extent that Darwin himself disagreed with them, they'd simply say that he was being inconsistent, and they weren't.
And Hitler himself definitely pointed back to Christianity as justification for his ideas:
"My feelings as a Christian points me to my Lord and Savior as a fighter. It points me to the man who once in loneliness, surrounded by a few followers, recognized these Jews for what they were and summoned men to fight against them and who, God's truth! was greatest not as a sufferer but as a fighter.
In boundless love as a Christian and as a man I read through the passage which tells us how the Lord at last rose in His might and seized the scourge to drive out of the Temple the brood of vipers and adders. How terrific was His fight for the world against the Jewish poison."
--Adolf Hitler, in a speech on 12 April 1922 (Norman H. Baynes, ed.
The Speeches of Adolf Hitler, April 1922-August 1939, Vol. 1 of 2, pp. 19-20, Oxford University Press, 1942)
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Now, if you are going to link the TOE to the Holocaust, then would you not also have to link Christianity?
The people who were hanging Witches in Old Salem Towne thought they were obedient to God and fighting Satan too! Does that point back to the teachings of The Bible? No! And neither can natural selection identified by Darwin be blamed for the evils of the Holocaust.
To say so denies and attempts to negate the persecutions of the Jews across civilization since the diaspora. Darwin did not invent anti-Semitism! Extreme instances of persecution in history include the German Crusade of 1096, the expulsion from England in 1290, the Spanish Inquisition, the expulsion from Spain in 1492, the expulsion from Portugal in 1497, all long long before Darwin.
I consider it almost criminal to even cast the aspersion, for everyone that attempts to connect Darwin with Hitler is implying that any intelligent and thinking person that accepts evolution also hates Jews. Talk about violating Godwin's Law, this takes the cake!