The real disgrace are those who can not see that both left and right have their extremists and violent elements. That being said Charlottesville is a left wing violence offence not a right wing one. The guy who organized the original event is a big Obama supporter and participant in Move On. The right wing side had all the permits required to hold a lawful rally. (free speech is a protected right in the US). Antifa and BLM did not have permits to hold counter rallies and thus were the law breakers. Antifa and BLM are little more than American Taliban who seek to violently suppress any opinion that runs counter to their own. (Witness Berkeley) Trump was right to condemn all to resort to violence regardless of the labels people attach.
