While I don't condone what they did, let's not forget the many instances of Taliban fighters torturing and mutilating their prisoners, before and after death, so they could post their own videos. I would agree to appropriate punishment for these soldiers if they would agree to punish their own. But I wouldn't expect that, since they want the double standard: "we can do it, but you can't."
Does that translate as, "They do worse than us, so they must stop before we do? Stop complaining!"