This essay by Spencer Sunshine is over ten years old now, but still very informative on national-anarchism and other attempts at fascist use of leftist ideas.
"The danger National-Anarchists represent is not in their marginal political strength, but in their potential to show an innovative way that fascist groups can rebrand themselves and reset their project on a new footing."
A history of Troy Southgate's "national-anarchism" initiative. "Its importance lies in the case study it supplies of fascism as an amorphous and continually metamorphosing phenomenon." The paper concludes with a warning to anarchist activists they take care not to be national-Bolshevized.
Graham D Macklin. "Co-opting the counter culture: Troy Southgate and the National Revolutionary Faction." _Patterns of prejudice_ 39, no. 3 (2005): 301-326.
A nice breakdown of the several faces of the alt-right.
"We are moving into a bleak period, when understanding the forces opposing us will be more important than ever. That means exposing supremacist ideologies in all forms and guises, but it also means developing a political vocabulary that lets us make distinctions, rather than treat all enemies as one undifferentiated mass."