Wow, your own citations admit the violence the night before was solely Neo-Nazi, without any counter protesters.
The protest turned violent after the Left showed up and started attacking the neo-Nazis like they have with those they don't like elsewhere. They threw frozen water bottles, bottles filled with urine, cans of soup, and used pepper spray. That is a classic radical Leftist tactic at riots. The neo-Nazis fought back.
If anything, the MSM downplayed the Left's violence while amplifying that of the Right. Not unexpected.
Or remember the Fourth of July Gettysburg Neo-Nazi protest? They went to protest against Antifa peeing on the Confederate graves at Gettysburg... The obvious problems with this is there are no Confederate graves at Gettysburg, and Antifa does not care about it all. That ended with threats against park rangers, attacks on Black park goers, and one Neo-Nazi shooting himself in the leg.
That seems to be a common theme to Neo-Nazi protests. They often shoot themselves in the leg.