There's a long, hideous history of violent white supremacism in the USA. White supremacism is based on a rationalized hatred of non-whites and this systemic hatred has shaped American history as long as there has been one. The white supremacists in Charlottesville were celebrating this hideous history of race hatred, and calling for the reinstatement of white supremacy as the law of the land. 

As long as there are white supremacists in the land, there will be no peace. Nor should there be. If you read the history of civil rights movement in the USA one thing you'll see is that LBJ and Humphrey and the others who pushed through the Civil Rights and Voting Rights Acts understood that as long as white supremacy was the law of the land there was going to be violent unrest.

No justice, no peace. It's as simple as that. White supremacism and Naziism are too dangerous to domestic tranquility to go unsuppressed.