For all Americans talk about having rights and freedom you do seem incredibly quick to give them up in the face of authority.
If you don't want to be told what to do, don't riot, loot, and destroy.
If you're trying to say that our citizens can just burn our cities down, and there's nothing that can be legally done about it, I really don't understand you.
In all the clips you see, they're no longer peaceful protesters. All of the clips cut out all of the context. That's the piece you're missing. Peaceful protests happen every day and the police don't order them to disperse. Police only order them to disperse when they've become a public safety hazard.
Or maybe you think that holding an umbrella wrong is reason to gas and throw explosives at an entire crowd of people.
Categorically false
There are hundreds of videos showing the police brutalising peaceful protest. Watch them.
Single example - How about peaceful protestors at the Whitehouse being tear gassed, batoned and charged to make way for the president's photo op?
[1] https://twitter.com/GarrettHaake/status/1267824405876359173