The Answer, they invariably take place in cities & areas where the leadership has a dim view of the 2nd amendment.
I have a sneaking suspension that neighborhoods and towns where citizens are well armed are not going to see the riots we have seen in some cities, and I further predict that business owners who are in front of their shops holding a shotgun will find their shops largely intact and protesters limiting their activist to actual protesting and marching.
By Jacksonian lights, no rule of law works without the threat of force, and if the threat of force is removed then lawbreakers will come out of the woodwork.
Local communities that are well armed and make it clear that those commuting violence are taking their lives in their hand will remain safe, communities that signal looting and rioting will be tolerated will get more of it.
It’s that simple.
Closing thought: I submit and suggest that the left has been hoping and praying for something like this for a long time and their real desire is to have some useful idiot get killed while threatening an armed citizen so they can use said idiot as a martyr. To the left, who will do all they can to get this outcome , this would be a feature not a bug because they believe it to be to their advantage politically and to some degree financially.
I predict this will continue until they conclude that it will cost them more votes than it will gain.