I may be mistaken, but I've read that both sides had permits to assemble.
The rightwing group had a permit first granted, and then revoked.
In the interim, the antifa group obtained a permit.
The right went to court after their permit was revoked (and after the permit to the left was issued). The right argued that since the city did not revoke the leftists' permit, they had a right to assemble, as well. The judge agreed and restored the permit.
I could have that wrong.
The car incident aside, looks like the rightwing groups essentially remained nonviolent during their march. It was THE LEFTISTS that instigated the violence.
Of course, the media won't report this.
And I wonder what the DOJ will have the intestinal fortitude to report, as well.