When I think upon the story, I realize that I, too, am not willing to let my kids use that phrase. Over the years a number of sincere Christians and a greater number of Jews influenced by missionaries have asked me this question. He is also the Son of G-d, and like any son, is essentially the same as his father. The Prophets predicted a world of peace and love after the Messiah's coming, and this certainly does not exist today. In no place do the Prophets say that the Messiah will be anything more than a remarkable leader and teacher.
Man is evil and sinful.
All mankind is damned because of Adam's sin. The Torah cannot save man, since its many commandments make it too difficult to keep. The only thing that can prevent man's utter damnation in hell is the belief in Christ. Man might not be able to perfect himself, but it was for this reason that G-d gave us the Torah. It is absurd to think that G-d would give a Torah that was impossible or too difficult to follow.