No, it wouldn't? Charleston was the site of a right-wing protest, co-opted by neo-Nazis, and then counter-protested by left wing people.No, the equivalent would be a left-wing extremist running over/shooting up a moderate right-wing protest. I don't recall such a thing in the past 5 years.
The equivalent would be a left-wing protest, co-opted by communists, who then attack right-wing counter protesters. Which is a reasonable description of Antifa. Admittedly, I was imagining the left-wing protest that got taken advantage of by a violent extremist who opened fire on the police response.