"In the 12th century, Peter the Venerable, Abbot of Cluny, initiated a dialogue with the Islamic world. "I approach you not with arms, but with words," he wrote to the Muslims whom he imagined reading his book, "not with force, but with reason, not with hatred, but with love." Yet his treatise was entitled Summary of the Whole Heresy of the Diabolical Sect of the Saracens and segued repeatedly into spluttering intransigence. Words failed Peter when he contemplated the "bestial cruelty" of Islam, which, he claimed, had established itself by the sword. Was Muhammad a true prophet? "I shall be worse than a donkey if I agree," he expostulated, "worse than cattle if I assent!" Peter was writing at the time of the Crusades. Even when Christians were trying to be fair, their entrenched loathing of Islam made it impossible for them to approach it objectively. For Peter, Islam was so self-evidently evil that it did not seem to occur to him that the Muslims he approached with such "love" might be offended by his remarks. This medieval cast of mind is still alive and well."