Whatever the other facts of the situation it is not appropriate to seek to discuss the actions (or rather reactions) of the soldiers in isolation from the things to which they were reacting.

I disagree. Regardless of what they were or weren't reacting to, their behaviour was wrong. I doubt that is how they were trained to restrain anyone barefoot and unarmed. Gratuitous thuggery in glorious technicolour that now endangers their colleagues lives.