Yes, but condemning an action is not the same as actually doing something to stop it. They would have the power to if they wanted, it's just too much hassle, with nothing to gain.
Britain- "Hey Israel, could you please stop all those war crimes, they kind of violate international treaties and all that"
Israel-" :muddlehea*bombs some more civilians "accidentally"* "
lol, took the words out of my mouth. America urges restraint constantly. If my friend starts beating the daylights out of a smaller, weaker guy who can't fight back, and all I do is sit back every now and again saying "be sure not to overd= do it" very few people would consider my actions morally admirable.