The Nazi party in question has not actually killed anyone or incited fatal hate crimes, no matter how reprehensible its ideology might be.
Al Sharpton has been at least indirectly involved in two incidents in which people were killed. The race riot to which you refer was a reenactment of the Night of the Broken Glass, with Sharpton’s followers yelling “Kill the Jews.” The other was the fatal arson of Freddy’s Fashion Mart.
Ok, I had conflated the two incidents in my mind. Thanks for giving me more information.