It seems you
A. Can't be silent
B. Have to choose an extreme polarized side - cops bad or protests (or riots) bad. Anyone against protest inhumane vs anyone calling for cop violence good.
C. Can't be a centralist.
How do you avoid confrontation when the person is putting a gun at your throat to make you say something extremely polarizing political stuff?
I am more than happy to discuss ways to resolve racism issues but I won't generalize or join the mob moralising of people having different opinions than them and witch hunting.
When someone is putting you on the spot, you have two options: Say very little, or shut them down. If you try to say very little, they may keep pushing, and force you to either (pretend to) agree, or to oppose them.
If it's not someone who has power over you (like a boss, say), I'd be inclined to tell them to take their limited, black-and-white, extremist view and get lost.
Being silent is violence and so is any other opinion other than complete agreement. What a nice norm to establish for someone like Trump to hijack.