As someone who interviewed a Lebanese patriot I feel that the only way Sharon could have stopped the Christian Lebanese was to shoot them. They wanted revenge for the killing of their leader and no one was going to stop them short of by use of force. This was highly unlikely, that the Israelis would shoot their allies. Sharon got a bum rap on this one and let us not forget the Israelis were going after the PLO fighters and not the villagers as it was the PLO that were attacking Northern Israel on a consistent basis.
Netanyahu: We distinguish ourselves from our neighbors by denouncing murders in our midst (Haaretz)