As long as it's a mostly peaceful prostest, you're also allowed to set a few cars on fire and loot local businesses.
Get all those folks marching, you aren't going to get good decisions out of everyone.
But the expression of the people is hard for those in power to ignore.
Which is kinda why people are upset enough to set shit on fire.
Martin Luther King Jr. was subject to the same bullshit. https://www.reddit.com/r/agedlikemilk/comments/iia9lq/this_c...
Unreasonably people were digesting meat from innocent animals, slaughtered previously, which was violent. And their shoes... They trodded upon insects, and plants. Violence! Again, unreasonably labeling as violent.
Reasonableness matters in judgement, in my and the legal system's view.