I saw the one where a journalist was shot with rubber bullets. What does the flag have to do with anything? Aren't you guys supposed to have freedom of expression?
Freedom of expression isn't immune from ridicule or condemnation. In one NYC anti-ICE protest they're chanting "From Mexico to Gaza, globalize the intifada". You can argue that's freedom of expression, as is burning the US flag and other dopey unhelpful actions.
Most of those same cops are staffing PDs today, so they will behave exactly as they did back then. Nobody sane should give them any benefit of doubt.
You obviously disagree with it, but that doesn't mean it's not protected.