In the year leading up to George Lincoln Rockwell's assassination, he was trying to take the American Nazi Party in a new direction. Not everyone within the party was on board with the changes.

Sources:

Schmaltz, William H. (2000). Hate: George Lincoln Rockwell and the American Nazi Party. Washington, D.C.: Brassey's

Schmaltz, William H. (2013). For Race And Nation: George Lincoln Rockwell and the American Nazi Party. River's Bend Press

Simonelli, Frederick J. (1999). American Fuehrer: George Lincoln Rockwell and the American Nazi Party. Urbana: University of Illinois Press.

Griffin, R. S. (2001). The Fame of a Dead Man’s Deeds. 1st Books Library.

https://time.com/5096937/martin-luther-king-jr-picture-chicago/ 

https://www.researchgate.net/publication/323670005_An_order_of_crime_the_criminal_law_of_the_Independent_State_of_Croatia_NDH_1941-1945