It happened.
One day in May 1212 there appeared at Saint-Denis, where King Philip of France was holding his court, a shepherd-boy of about twelve years old called Stephen, from the small town of Cloyes in the Orléannais. He brought with him a letter for the King, which, he said, had been given to him by Christ in person, who had appeared to him as he was tending his sheep and who had bidden him go and preach the Crusade. King Philip was not impressed by the child and told him to go home. But Stephen, whose enthusiasm had been fired by his mysterious visitor, saw himself now as an inspired leader who would succeed where his elders had failed. For the past fifteen years preachers had been going round the country-side urging a Crusade against the Moslems of the East or of Spain or against the heretics of Languedoc.
...One day in May 1212
800 years is a long way to go back to make a point. Christians have a lot blood in their history, that's not debatable. But we all live in the present. Christianity, by and large, cleaned itself up. We're waiting for Islam to do the same.