Inexcusable, disgusting and abhorrent to any enlightened society. When we are savages to children, how can anyone expect us to be anything close to tolerant towards minorities or anyone else deserving of it? Jesus would be having a field day on these asshats.
It seems to me that in both situations, the adults acted like children, and the children acted like children who were afraid they were being led by people more immature than themselves. Restrain the child? Sure. And you have two large adult cops, and one very frightened and angry little boy. It seems to me that there are much much better ways of handling the situation.
Like, you know, talking until the kid finally exhausts himself? And if he's a threat to other children or adults, remove them, not the kid, until you can establish calm and reason.