There was a great thread about this when it happened. In that thread and over the course of time the media finally addressed the fact that the white supremacists had coordinated with the local authorities and gotten a legal permit that allowed them to exercise their Constitutional Right to peacefully freely assemble and to march. People may hate what they stand for / believe, but the Constitution affords thee rights to every American citizen and does not require 'your' approval of their beliefs.
An interview with the leader of Antifa who showed up that day, wearing protective gear and carrying weapons. The Antifa leader admitted they showed up n Charlottesville with the full intent to INSTIGATE VIOLENCE by attacking the white Supremacists.
At the time the President simply stated the violence engaged in was not only the fault of the white supremacists but of 'others' as well.
The Antifa leader's admission that they showed up there - without having coordinated with local officials, without having gotten a permit to demonstrate, wearing protective gear, and brandishing weapons -with the full intent of INSTIGATING violence proves the President was indeed right.