Who was Jesus, really? It has become acceptable, even fashionable, lately to speak of the Christian Lord in casual terms, as though he were an acquaintance with a mysterious past. Pope Benedict’s trip to Brazil last week revived an old retelling of the Christian story in which Jesus is cast as a social revolutionary determined to overthrow the established order. The massive success of “The Da Vinci Code” reflected the hunger of millions to see Jesus as a regular person