The Fidais' apparent lack of fear of personal injury or even death could not be understood by the Crusaders, who propagated the black legends of the so-called Assassins. According to Daftary, these were "fictions ... meant to provide satisfactory explanations for behavior that would otherwise seem strange to the medieval Western mind". These black legends were then further popularized in the Western world by Marco Polo, the Venetian storyteller who had, in fact, never investigated Sinan, in contradiction to his claim that he had. Polo asserted that Sinan fed hashish to his drugged followers, the so-called "Hashishins" (Assassins), so as to fortify them with the type of courage to commit the assassinations of the most intrepid kind.