In an ideal situation, right-wing vigilantes would provide protection to residential neighborhoods, mom and pop shops, and the general public, while left-wing vigilantes burned down police stations and the lumpenproletariat looted Wal-Mart. But I’ve noticed that many situations tend to be less than ideal.
This article is an interesting “intellectual Antifa” perspective on the present state of affairs. I’m generally inclined to view “far-right vs. far-left” street battles the same way I might view a street fight between Moonies and Scientologists.