The actual title of Darwin’s book regarding the Evolution Theory is: The Origin of Species by Means of Natural Selection or the Preservation of Favoured Races in the Struggle For Life. It was used to justify slavery.
Not by Darwin.
But, as I recall, the Bible was frequently used to justify slavery, more so than anything Darwin ever wrote. We have one or more posters here who have refused to condemn slavery because of that.
Darwin’s ideas were racist. Favoured races was about human beings as well as finches. Hitler based his “supremecy” on this book. Hitler’s men tortured jews and told them it was being done in Jesus’ name. Conquistadors killed americans in the name of Jesus. If someone runs over a suirrel in my name doesn’t mean I approved it. :) Slavery’s bad m’kay.
Creationist Claim CA005.1: Charles Darwin was a racist [rebuttal at this link].
Darwin spoke of races as some speak of "kind."
Darwin cannot be condemned because of Hitler's misdeeds. Neither can the Bible.
Conquistadors killed more for the love of killing than anything else. Religion was just their excuse.
If someone runs over a squirrel, or if Hitler uses any excuse for his insanity, neither is doing it in your name, or in Darwin's name.
Slavery's bad, but it has nothing, or very little, to do with species.