Finally, a leader has spoken about the real, essential differences in the struggle between the West and Islam, as it emanates from a contest within Islam itself over the most important things. With startling -- indeed alarming -- clarity, Pope Benedict XVI told his audience in Regensburg, Germany, in a 2006 lecture, that not only is violence in spreading faith unreasonable and therefore against God, but that a conception of God without reason, or above reason, leads to that very violence. To ensure everyone knew what he was talking about, the pope quoted from a 14th-century Byzantine emperor,...