George Lincoln Rockwell, the wonderful fucking man that he was, was shot by Patler because Patler was an autistic little Communist who'd long been harping on weird shit to Rockwell; by the time Rockwell had enough of his autism, Patler had really gone full-on retard.
He was literally prancing around far-left causes some years later - the movements themselves? Dismantled as a result of Hoover's general order to dismantle extremist and militant racial groups throughout that latter-day period; both got infiltrated, dumbed down, etc. hence why we no longer see real organized "black militarism"..this isn't it, not even close.
It's here we witness the result of both time wearing down on the standards of groups aspiring to militarism that don't actually go forth with any revolution and the result of sectarianism, in the case of the NOI.