In her 1938 autobiography, Margaret Sanger discusses her keynote address at a Silver Lake Ku Klux Klan Rally.
Why did you forget to mention that your photograph is a complete invention, cobbled together by someone with only rudimentary skills in Adobe? Here's the real photo which was inserted into a Klan picture:
http://www.u.arizona.edu/~roxanne/womanrhetor/margaretsanger2.jpg