“Colored people are like human weeds and are to be exterminated.”
Unknown source, attributed by Life Education and Resource Network (LEARN) http://www.blackgenocide.org/planned.html and by Roger L. Roberson, Jr, The Bible & the Black Man: Breaking the Chains of Prejudice (2007), p. 18.
Seems to take "human weeds" from "a garden of children instead of a disorderly back lot overrun with human weeds" or from "the gradual suppression, elimination and eventual extirpation of defective stocks– those human weeds which threaten the blooming of the finest flowers of American civilization" and "exterminated" from "we do not want word to go out that we want to exterminate the Negro population, and the minister is the man who can straighten out that idea" (see above).
Misattributed
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Margaret Sanger 61
American birth control activist, educator and nurse 1879–1966Related quotes

Preface, Leading Case of Jesus Christ
1930s, On the Rocks (1933)
Context: I dislike cruelty, even cruelty to other people, and should therefore like to see all cruel people exterminated. But I should recoil with horror from a proposal to punish them. Let me illustrate my attitude by a very famous, indeed far too famous, example of the popular conception of criminal law as a means of delivering up victims to the normal popular lust for cruelty which has been mortified by the restraint imposed on it by civilization. Take the case of the extermination of Jesus Christ. No doubt there was a strong case for it. Jesus was from the point of view of the High Priest a heretic and an impostor. From the point of view of the merchants he was a rioter and a Communist. From the Roman Imperialist point of view he was a traitor. From the commonsense point of view he was a dangerous madman. From the snobbish point of view, always a very influential one, he was a penniless vagrant. From the police point of view he was an obstructor of thoroughfares, a beggar, an associate of prostitutes, an apologist of sinners, and a disparager of judges; and his daily companions were tramps whom he had seduced into vagabondage from their regular trades. From the point of view of the pious he was a Sabbath breaker, a denier of the efficacy of circumcision and the advocate of a strange rite of baptism, a gluttonous man and a winebibber. He was abhorrent to the medical profession as an unqualified practitioner who healed people by quackery and charged nothing for the treatment. He was not anti-Christ: nobody had heard of such a power of darkness then; but he was startlingly anti-Moses. He was against the priests, against the judiciary, against the military, against the city (he declared that it was impossible for a rich man to enter the kingdom of heaven), against all the interests, classes, principalities and powers, inviting everybody to abandon all these and follow him. By every argument, legal, political, religious, customary, and polite, he was the most complete enemy of the society of his time ever brought to the bar. He was guilty on every count of the indictment, and on many more that his accusers had not the wit to frame. If he was innocent then the whole world was guilty. To acquit him was to throw over civilization and all its institutions. History has borne out the case against him; for no State has ever constituted itself on his principles or made it possible to live according to his commandments: those States who have taken his name have taken it as an alias to enable them to persecute his followers more plausibly.
It is not surprising that under these circumstances, and in the absence of any defence, the Jerusalem community and the Roman government decided to exterminate Jesus. They had just as much right to do so as to exterminate the two thieves who perished with him.

Quotes:, Autobiography of Sir Henry Morton Stanley (1909)
“And the weed loud, like a lion's roar.”
Intro, written with Willie Hodge and Jermaine Preyan
2010s, Tha Carter IV (2011)

To Leon Goldensohn, April 8, 1946, from "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004

“I almost think it is the ultimate destiny of science to exterminate the human race.”
Gryll Grange, chapter XIX (1860).

“How much good it would do if one could exterminate the human race.”
A characteristic saying of Russell, reported by Aldous Huxley in a letter to Lady Ottoline Morrell dated 8 October 1917, as quoted in Bibliography of Bertrand Russell (Routledge, 2013)
1910s
“They are very dangerous, but we exterminate them like rats.”
On Serb snipers in the siege of Sarajevo. http://www.bhdani.com/arhiva/259/t25905.shtml
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