here's an article from P.C. Roberts (not liked by some here) about the Ku-Klux-Klan.
It contains some background information about the KKK ... I am not surprised, since I had done some study of USA history and civil war times.
Here is another article along similar or the same lines in light of what is currently happening
The language may be offensive to some ...especially if they consider themselves to be part of a particular group being addressed by the author of the article.