What the Pope said
...The emperor goes on to explain in detail the reasons why spreading the faith through violence is something unreasonable. Violence is incompatible with the nature of God and the nature of the soul.
God is not pleased by blood, and not acting reasonably is contrary to God's nature. Faith is born of the soul, not the body. Whoever would lead someone to faith needs the ability to speak well and to reason properly, without violence and threats... To convince a reasonable soul, one does not need a strong arm, or weapons of any kind, or any other means of threatening a person with death....
The decisive statement in this argument against violent conversion is this: not to act in accordance with reason is contrary to God's nature. The editor, Theodore Khoury, observes: "For the emperor, as a Byzantine shaped by Greek philosophy, this statement is self-evident. But for Muslim teaching, God is absolutely transcendent. His will is not bound up with any of our categories, even that of rationality." Here Khoury quotes a work of the noted French Islamist R. Arnaldez, who points out that Ibn Hazn went so far as to state that God is not bound even by his own word, and that nothing would oblige him to reveal the truth to us. Were it God's will, we would even have to practice idolatry.
As far as understanding of God and thus the concrete practice of religion is concerned, we find ourselves faced with a dilemma which nowadays challenges us directly. Is the conviction that acting unreasonably contradicts God's nature merely a Greek idea, or is it always and intrinsically true? I believe that here we can see the profound harmony between what is Greek in the best sense of the word and the biblical understanding of faith in God. Modifying the first verse of the Book of Genesis, John began the prologue of his Gospel with the words: In the beginning was the logos. This is the very word used by the emperor: God acts with logos....
...For philosophy and, albeit in a different way, for theology, listening to the great experiences and insights of the religious traditions of humanity, and those of the Christian faith in particular, is a source of knowledge, and to ignore it would be an unacceptable restriction of our listening and responding. Here I am reminded of something Socrates said to Phaedo. In their earlier conversations, many false philosophical opinions had been raised, and so Socrates says: “It would be easily understandable if someone became so annoyed at all these false notions that for the rest of his life he despised and mocked all talk about being - but in this way he would be deprived of the truth of existence and would suffer a great loss”.
The West has long been endangered by this aversion to the questions which underlie its rationality, and can only suffer great harm thereby. The courage to engage the whole breadth of reason, and not the denial of its grandeur – this is the program with which a theology grounded in Biblical faith enters into the debates of our time. “Not to act reasonably (with logos) is contrary to the nature of God”, said Manuel II, according to his Christian understanding of God, in response to his Persian interlocutor. It is to this great logos, to this breadth of reason, that we invite our partners in the dialogue of cultures. To rediscover it constantly is the great task of the university.
What Jeff Jacoby said
If it weren't so sickening, it would be farcical: A line in the pope's speech suggests that Islam has a dark history of violence, and offended Muslims vent their displeasure by howling for his death, firebombing churches, and attacking innocent Christians. One of the points Benedict made in his speech at the University of Regensburg was that religious faith untethered by reason can lead to savagery. The mobs denouncing him could hardly have done a better job of proving him right. . . .
But the real insult to Islam is not a line from a papal speech or a cartoon about Mohammed. It is the violence, terror, and bloodshed that Islamist fanatics unleash in the name of their religion -- and the unwillingness of most of the world's Muslims to say or do anything to stop them.