There is a debate that follows political activism – whether to be peaceful or violent. I’ve seen reviews of contrary scholarship. One view is that the old KKK used many of the same tactics as the modern “Alt-right,” using clownish outfits to draw in supporters so that laughter just helps their strategy and is an unhelpful response: The Ku Klux Klan Used the Same Trolling Tactics as the Alt-Right: https://psmag.com/social-justice/the-ku-klux-klan-were-memelords. Instead that scholar argues that Klan opponents at the turn of the 20th century literally beat them up. There were communities that kept the Mafia out the same way. But that view underestimates the impact of the Klan. Literally it kept a large part of the U.S. intimidated, quiet about their depredations, and unwilling to investigate or convict for a century. I don’t see good evidence that violence held the Klan in check.
The reverse view is that violence feeds the Alt-wrong. This is the same point many have made about violence in Afghanistan, Iraq and Palestine. Violence feeds the sense of discrimination that is a large part of the Alt-wrong rhetoric and sense of grievance. Thus it becomes a recruiting tool. Plus the Alt-wrong appears way more ready to use violence to harm and intimidate than any other populations in America: Don’t respond to fascists with violence. A German town offers some helpful tips. See:
The Civil Rights Movement put a very large effort into staying nonviolent. Violence was always the tool of the enemy and demonstrations were arranged to highlight that violence for a national audience, preferably on television. That effort was much more successful in shutting the Klan down than the earlier confrontations.
I would add that the contemporary American public is much more hostile toward violence than it was in 1900, despite the posturing, violence and intimidation of the Alt-wrong. So it is very important to avoid becoming the perpetrator of violence, and to follow the tactics of Dr. King and the Civil Rights Movement of the 1950s and 60s. By contrast the antiwar movement, against the war in Vietnam, did resort to property destruction and my judgment was that they lost support in those demonstrations. I much preferred demonstrations carrying candles to St. Patrick’s Cathedral, or the reading of the names of American servicemen killed, and similarly powerful, but nonviolent demonstrations. I would follow the insight of Dr. King and the Civil Rights demonstrators in the present struggle and keep ourselves peaceful.
With all good wishes for you and for our country, Steve