Peter Singer in Project Syndicate:
Let’s grant that the antifa activists are right about the irrationality of hard-core racist fanatics. It remains true that in the United States, and other countries where elections are the path to power, the far right can achieve its goals only by winning over middle-of-the-road voters. Even if many of these voters are also not completely rational – few people are – they are not likely to be won over to the anti-racist cause by seeing footage of anti-racists hitting racists with clubs or throwing urine-filled water bottles.
Such images convey, more than anything else, the idea that anti-racists are hooligans looking for a fight. Dignified nonviolent resistance and disciplined civil disobedience are more conducive to demonstrating a sincere ethical commitment to a better, non-racist society than clubbing people and hurling piss at them.
Violent resistance is particularly dangerous in the US because some states allow anyone to carry a firearm. In Charlottesville, a large number of white supremacists paraded through the streets dressed in camouflage and carrying semi-automatic assault rifles. If the antifa activists are going to match the racists in violence, will it be possible to hold the line at clubs? How long will it be before the deadly weapons now openly on display are also used?