Yes, I think you could be right (one of the neo nazis was recorded assuring reporters that his knife was legal in California, kind of strange how he did that research in advance)- but that is speculation.
What appears to be fact is that the leader of the anarcho fascist faction (tongue twister) put on an "attack on site" order. This could trump who heckled who, and who did what first type arguments.
For example, following the biker brawl in Waco, the leader of the Bandidos club was charged with not only some standard drug charges, but also some RICO violations as he had been recorded ordering members of his group to attack rival Cossacks on site and also been recorded congratulating individual Bandidos who had taken part in attacks.
Though the anarcho fascist leader was not video taped before the brawl, she has appeared on video after the brawl aknowledging that there was an attack on site order put out by her group and also congratulating her faction's fighters for their roles in the attack. Needless to say, federal charges are nothing to sneeze at, and the feds rarely lose. She had better hope that the feds dont get involved.