In the long history of attacks on Europe, starting in the 700's when Charles Martell ("Karl the Hammer") defended the European heartland at the battle of Tours (732/733 A.D.) and repelled the invaders, and lasting at least until 1683, when Vienna was attacked, but not conquered, the figure of Saladin stands out as one of the most vicious military leaders to attempt to destroy Europe.
After military confrontations, the standard practice of his troops was to torture and kill the military prisoners as well as any civilians from the opposing side. Women and children were no exception, and Saladin's soldiers used rape to terrorize local populations.
On July 3, 1187, when Saladin's army attacked a group of Europeans at Hattin, he gave an order which has been preserved for us in writing: all the Europeans were beheaded; no prisoners were taken.
The mystery of Saladin is why, a few months later, in October of 1187, when he captured the city of Jerusalem, he did not execute the Europeans there. In his long and bloody career, this was the one time that he choose not to kill the prisoners he had taken. Why?
His magnanimity was actually pragmatism. He had intially planned to put to death all the Christians in the city. However, when the Christian commander inside Jerusalem, Balian of Ibelin, threatened in turn to destroy the city before Saladin could get inside, Saladin relented - although once inside the city he did enslave those Christians who could not afford to buy their way out of town.
So Saladin made a double profit: ransom from those who could pay, and income made from selling the rest as slaves.
Balain of Ibelin, by the way, was not a European. He was a native Middle Easterner, but one who had escaped the forced conversion to Islam being spread by armies like Saladin's.
Saladin, it seems, was content to put aside his genocidal passions, if he could gain financially from it.
