'Warraq himself argues, against the politically-correct view, that Muslim hatred of Jews goes back to the origins of Islam. The persecution of Jews, and also Christians, stems from the precepts and principles in Islamic texts: the Koran, the Sira (the biographies of Muhammad), the Hadith, the Tradition (records of the deeds and sayings of Muhammad), and classical Koranic commentaries.
Equally significant is Warraq's answer to the fashionable argument that the West in the past and Israel in the present are responsible for the troubles of the Muslim world. He refers to the events of the Crusades in 1095, dealt with inThe Talisman and in three other of Scott's novels, to provide a corrective interpretation.
Undoubtedly, the Crusaders of the 11th century were cruel, rapacious, and fanatical, and exhibited irrational religious bigotry. Not all of them were chivalrous, contrary to romantic literature. But Warraq's argument is that Islamic intolerance was and is much greater than Christian intolerance, now a thing of the past and no longer a threat to civilization.'
More here http://www.thecommentator.com/article/4231/islamic_tolerance_myth_and_reality