Let me just flip this back on you then. You and those you quoted keep saying nothing has changed since the 60s. There have been multiple violent protests and riots since then so that means violent protests achieved nothing. Since you know that violent protests are completely useless because nothing has changed why would you think that they are useful as a tool of change. The best argument against violent protests is your and others assertion that nothing has changed despite them. Don’t just single out peaceful protests as being useless.
I cant really tell you what to do because I believe a lot of things have changed. You have affirmative action for example to help disadvantaged minorities but I’m not going into that because I can see this being turned into a strawman of me saying that everything is perfect and there is no racism.
I already suggested going on strike as an effective means of protest that damages the economy but that was dismissed as people need to work in order to eat. Not sure how that fits in with rioting and looting maybe people go on paid leave for that.
As
@Halftrack mentioned (which I know you dismissed), I never said that nothing had changed; I said it's way too little. I agree with the point you made elsewhere that any progress is good, but what has changed is simply nowhere near good enough, as simple stats about socioeconomic and health situations of Black people demonstrate.
I would also say that violent protests have often been a catalyst for the little change we did see. Take police brutality for example: it's been happening really long and been protested really long. Yet changes in US policing policies have been extremely slow. The explosion of protests after the George Floyd murder, however, have set a lot of things in motion very quickly. Many cities have taken meaningful action to reform their policing, and it got to the point where even someone like Trump (who really doesn't give two shits about Black people) signed an executive order about it. It didn't mean as much, but just to indicate how the explosion of protests reverberated. But as soon as the protests slow down, the issues go off politicians' radars, and we go back to business as usual - which in the US often means further policies about neoliberal economics and being tough on crime that hurt minority communities.
I'm not a violent person myself and I wish mass action (demos, strikes) would have the right effect. But it seems to me that violent protests have definitely been a catalyst for meaningful change, which otherwise comes unbearably slowly. In Canada, for example, Indigenous Peoples are often in awful situations, and while politicians are happy to acknowledge that and there is now finally(!) some kind of action plan, actual improvements are still almost unnoticeable. To really move things along, it looks like we need either a huge catastrophe (which would hurt Indigenous Peoples), or more impactful protests. In that case, I prefer the latter, even though that would probably hit my city. (They've done big rail blockades recently about what was a relatively minor issue in the grand scheme of things, and I hope they will now use those tools more often.)
If they choose to fight the system because they believe it is discriminatory against them then I have full respect for that. What I don't have respect for is those that indiscriminately use the protests and an opportunity to burn and loot and steal to enrich themselves. I think this is a perfectly reasonably stand but its a sign of the times where a person who condemns mindless violence is in turn criticized for doing so.
I think the bolded bit is a red herring. You talk here as if all or a representative part of the protesters engage in that kind of stuff, which is clear and utter nonsense. I also don't think anyone on here condones opportunists who use the riots to start looting. For myself, I also think looting is unhelpful and violence (if there has to be any) should first go against government stuff and mass infrastructure - i.e., things that represent the state and society. Looting small businesses that are out-of-context to me is completely besides the point, and yes, reprehensible.
It is a small price to pay when you don't have to pay it sure. Just like saying we need to die for freedom but lets send your children to die not mine.
This metaphor suggests that Black people should turn their violence against their own businesses and community. I suppose you might want to rethink your point here. My take would be that the 'enemy' is the state and society in general, and so if violence is the way, it should focus on things that represent those. (As I said above.)
(I feel like an absolute keyboard warrior writing these things btw. I hope I won't be a lazy coward if ever I'm in a situation where violence is required to fix an obvious wrong.)
Edit: I actually think enormous mass protests (like in Belarus right now) might be the best pressure tool. But it's hard to get those going for a minority, or to sustain then long enough. I anyway feel more ambiguous towards the violence then I'm admitting in my text above, I think. But I really can't judge people for it. (In this context; but not the looting of unrelated small businesses.)