“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