An Excerpt from Benedict's Lecture

The emperor [Manuel Ii Paleologus] 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.

Those last few sentences are of chief interest. Sure, God's transcendence should be guarded, and He is not bound to reveal himself--especially through any material means. But He does. That's central to the Gospel. God uses the familiar to reveal the unfamiliar--particularly, Himself i nthe form of a man. This is scandalous to anyone with a dualistic worldview.