hitler wrote. >> he was a one-time physics professor who became a leading figure in the white supremacist movement. >> felonous, traitorous. >> in the 1970s, pierce saw his cause in disarray. >> i for one will die before yield -- >> for years, the all-powerful ku klux klan had led the charge. >> threats. beatings. rapings. and, of course, murder. ♪ we shall overcome >> then came the civil rights movement. a crushing blow to the klan. >> free at last. free at last. thank god almighty we are free at last. >> in its wake, klan membership declined. and white supremacists were divided -- >> white revolution.