"Critics might argue that violence from counter-protesters justified Trump’s initial careful wording."

And they would be right.

That doesn't mean that the white supremacists shouldn't be condemned.  They should.  But this isn't an "either-or" like so many activists want to spin it.  Violence by ANY SIDE at a protest or rally is wrong and should be called out. 

Could Trump have called out BOTH SIDES more clearly and loudly?  Sure.  But those that think he should ONLY call out one side's violence and pretend like the other side's violence is OK are a big part of the problem, because they're tacitly condoning such violence when doing so.