Overall. The same is true here.
If a left-wing protester was being violent in order to defend themselves against a violent attack by these alt-right idiots then yes you're right. But that wasn't always the case in Charlottesville. Here's footage of a pretty tame speech by the organizer of the "Unite the Right" protests being attacked/punched by a protester...who chases him down & punches him again before being arrested by the cops (go to 17:30 in the video):
Every single one of us either supports this violence or condemns it as per the law, there's no other option. Nazis and anti-Nazi protesters should all be following the same basic rule of law, otherwise there will be chaos. The cops failed to uphold the law on every side during the protests since they were ordered by the mayor to stand down.