Taboos around violence for political are one of the crucial building blocks for a functioning democracy. If those taboos are broken, even for a good cause, you set a precedence that violence works. And the next cause won’t be as good. One only has to look at the lessons of the Roman Revolution that started with the murder of Grachus, and ended with an Emperor who everyone acclaimed as they were so tired of the bloodshed.
The non-violent protests of Colin Kaepernick were mocked and used to rally the other side and just weren't effective.
The problem here is not the violence, but a policing system that is so fundamentally damaged and has not been effectively reformed fast enough.
The MLK quote is trotted out pretty often, but "a riot is the language of the unheard".
But it's not clear that the violence/property damage component was worth it. Nationwide protests and all of the public outcry could have been enough. Hard to tell at this point.
We've had protests, for separate occasions, happen years and years and decades ago, and it has not been enough.
At which point will it be enough? How many more protests will it take? How many more decades will it take? Is anyone still on the fence on 2020 about whether or not bad cops are being protected by their peers and superiors? Do you have a timeline for when this sort of thing will change?
The failure after the riots was that we didn’t treat it as a national problem and undertake systemic reform of our policing systems from root to stem.