Margaret Sanger aligned herself with Eugenicist, is there any doubt of that? No need to make things up about her and as for Robert Byrd, what is there to make up? That he was a KKK leader in WV who went on to become a 50 year leader for the DemocRAT party and "Mentor" to Hillary? Nothing to make up there either.
Margret Sangers letter to Dr. Clarence J. Gamble, December 10, 1939,
p. 2 "We don’t want the word to go out that we want to exterminate the Negro population..."
https://libex.smith.edu/omeka/files/original/d6358bc3053c93183295bf2df1c0c931.pdf…
Taken From "My Way To Peace" By Margaret Sanger
https://www.nyu.edu/projects/sanger/webedition/app/documents/show.php?sangerDoc=129037.xml
(c) keep the doors of Immigration closed to the entrance of certain aliens whose condition is known to be detrimental to the stamina of the race, such as feeble-minded, idiots, morons, insane, syphiletic, epileptic, criminal, professional prostitutes, and others in this class barred from entrance by the Immigration Laws of 1924.
(d) apply a stern and rigid policy of sterilization, and segregation to that grade of population whose progeny is already tainted or whose inheritance is such that objectionable traits may be transmitted to offspring.
(e) to insure the country against future burdens of maintenance for numerous offspring as may be born of feeble-minded parents, the government would pension all persons with transmissible disease who voluntarily consent to sterilization.
(f) the whole dysgenic population would have its choice of segregation or sterilization.