I will also accept throwing cops at bricks.

Police: If I hit you, it is okay. I am allowed. Public: What if I hit you back? Police: WOAH, HOLD UP

We shouldn't be promoting violence. What if those bricks have feelings?

I believe that fighting cops, which are just the low foot soldiers, is designed to wear you out and waste your time, so your best fighters can't engage with the persons who keep the system shitty.

Why?

So they double-down as a gang, remove accountability, and get more armoured and armed, seeking to suppress the masses though even more violence?

... Hrmm, maybe there are other ways, with better outcomes, than falling for that ploy to become the problem to provoke the reaction for the solution they had in mind all along.