[The Saucepan Man]

Originally Posted by Essex

Yes, but it is not Legolas's job to judge someone at this point.

But surely that is precisely what he does. He judges Saruman's life to be of greater value than that of Wormtongue, since he kills the latter in an attempt to save the former. And, in the context of the films, he is right to do so because Saruman is more useful to them.