Couple of very important points.
1. They are being peaceful. When they are not being peaceful, Dallas Police - who are escorting them and keeping an eye on them - are promptly arresting them and hauling them to jail.
2. In the 9th largest metro area in the US, with a very large black population, they only managed to get 200 people together at their peak with only 50 (one would assume that most of these people are JWP’s office staff) hard core idiots left. From the pics that were on the news, these were mostly old hard core libidiots.
3. Despite their attempts to rabble rouse, no rabble are being roused.
I respectfully but strongly disagree. They were blocking traffic. Every single one of them on I-35 should be hauled off to jail. Impeding traffic flow on a limited access highway is not being peaceful. On the other hand, your other two points do make sense.