Of course it is.  And don't try to confuse DEFENDING one's self from violence as violence.  Surely you're smarter than that.  Violence in this context means anyone willfully and wantingly engaging in it.  Saturday it was clearly many of the marchers AND many of the counter-protesters.  As I said... opposing idiots looking for a fight showed up to confront these idiots who were looking for a fight, and it all added up to violence, which is why we're even talking about it today.

Self-defense when forced into it is something entirely different.