I guess I fail to see your point. Are you saying that busting down doors with no reason to believe that there might reasonably be armed resistance is a legitimate exercise of authority, so long as serious injury doesn't result?
So let me make sure i understand your position. If 10 seconds from now, as I sit here at my computer, and my wife sits watching the olympics, a battering ram knocks my door down, flash-bangs and tear gas are thrown in, I find myself thrown to the floor with a gun in my ear and a knee in my back, my wife in the same position, its all good so long as we can walk away from it when they realize they were supposed to raid a house on Ivy road, not Ivy lane?
No. The man was butt stroked military style the way the article was written, but the specific injuries were not mentioned.