Great message and useful in using history to understand modern issues. I actually found the concepts useful when teaching US History.
But St. Francis did make an impression on the Sultan. Moved by his friendship with the friar, Al-Kamil showed mercy to the invaders when their army was surrounded and starving and allowed them to return to Europe. His reign lasted another 20 years, during which time he treated his Christian subjects fairly.
Now an Emmy® Award Nominated Motion Picture. More info.