The article points out that many protests in the U.S. went smoothly through the practice of police and protest organizers meeting and jointly managing protests, but that this practice fell into disuse after the 1999 Seattle WTO meeting in which protesters violated the negotiated terms and police responded with violence.
While some recent (and ongoing) protests have turned violent, many didn't. In the coming months we'll have time to do a postmortem. I strongly suspect spontaneous protests without organization will be found to have the most potential for violence, while those with organizers committed to self-policing and, ideally, cooperating with police will be found to have fared much better.
Individual people may be intelligent and responsible, but crowds have their own rules of behaviour and need to be managed. Protests are more dangerous when unplanned or when their organizers give no thought to self-policing.
There will always be organizers who want violence because it reliably brings press coverage and attention to their protests, but social media is also creating new problems. Coordinating a large number of people to show up at the same time and place used to take considerable planning and effort. When you have to work hard just to get the even to happen, why wouldn't you plan how it will unfold as well? Now a couple of tweets or posts on the right reddit subs will suffice. How can police meet with the organizer of a protest when it's really just some dude who had a lot of social media followers and might not even bother showing up himself?
The right to protest is baked into the first legal document the country as a political entity wrote. For the last 250 years politicians and cops have had the knowledge that Americans care a great deal about their right to stand in front of a statehouse and shout to their heart's content. They should create their own policies to deal with that fact. If that means ensuring no roads go near the statehouses, that there's ample space around popular protest spots, hell that there's guaranteed public restrooms in those areas, so be it. It also means that cops should have 250 years of collective knowledge in how to deescalate... But instead they've always gone the violent route (remember the 60s, when young black people were being shredded by police dogs?)
Now that being said, black lives matter in particular suffers from (in my opinion) a lack of leadership and organization. Over the weekend I wanted to attend protests. I have 100 surplus masks and shitloads of water bottles I wanted to give out. But after a straight hour of searching on every social media platform I could conceive of (as well as Google and just asking on Twitter) I found nothing but out of date websites, with articles from the beginning of the black lives matter movement.
If I want to donate money, I can choose between several different variations of the name "black lives matter," with no way to verify that these are representative organizations, or where the money goes.
During the protest (I just turned up at city hall and hoped for the best - it happened to work out), I didn't see any sort of leadership. Sure some local community leaders turned up, but nobody that represented any sort of modern iteration of a black rights movement.
Far be it from me to tell people how to best accomplish social goals - in my opinion raw, unfettered, and disorganized rage is a perfectly valid outlet for the people against the crimes of the American police system. I just feel like organization could only help.