That cuts both ways. There are a lot of people who see themselves as pro law and order, would deplore a protest in which a police officer was killed, would norm

That cuts both ways. There are a lot of people who see themselves as pro law and order, would deplore a protest in which a police officer was killed, would normally be horrified by protesters chanting “shoot him with his own gun” when they isolated an officer, yet sympathise with the Capitol protests where both of these things happened. The truth is most of the Capitol protesters probably had no intention to actually hurt anyone. The same is true of most of the people at BLM protests. Yet in both cases there are extreme elements that revel in violence for their respective cause. The problem isn’t left wing extremists or right wing extremists. The problem is extremists and those on either side that, while not violent themselves, offer aid comfort and support to those that are. That justify violence selectively in some cases while deploring it in others for partisan reasons.