You don't attack non-violent protestors or bystanders. You use proportional violence and only as a last resort.
But more importantly, you avoid these kinds of situations by not being an absolutely inhumane and racist police force that should be a disgrace to any nation that calls itself civilized.
I do find it fascinating and a bit scary that you can read this article, watch the linked videos, and then come up with a comment like this though. Is this kind of stuff that normalized in the US?