Yes, thank you for that. More people from the left, including several key Medium anti-racist authors, are buying into Family Research Council's anti-Planned Parenthood propaganda labeling Sanger a racist, eugenicist & virtual Neo-Nazi. This is largely because she did argue poverty was hereditary, inasmuch as generations couldn't change their circumstances until women took control of their reproduction.
She did address the KKK. Twice, I believe. But in the mid 1920s they were a key organization in the south & midwest. I think she would address any such organization if she could get her message out. She also worked with the NAACP, & WEB Du Bois sat on the board of directors of the first PP established in Harlem.