Comments by "Piotr Misiuna" (@contemporiser) on "Buffalo police push: Man, 75, left seriously injured after being shoved to the ground by an officer" video.

Training gives results. They must keep walking and keep the front line closed. The initial push is exactly what he was trained for. They don't teach them to use judgement of situation or how to be reasonable. And they choose stupid enough ones, so the will not develop it on their own. He is innocent like a dog ripping a kitty.
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