Crusade preachers reframed Islam’s self-correction claim as anti-Christian destruction

Evidence

Humbert of Romans, in sermon material for the preaching of the Crusade, said that Christ was supposed to be greater than Moses, and Muhammad than Christ, each for the correction and setting forth of the former religion. In a later work, intended to influence, not the general Crusading public, but the Fathers of the Council of Lyons, he spoke still more clearly. Muhammad gave his religion ‘especially for the destruction of Christianity’, in that ‘he said that he was sent as a prophet of God to explain and correct the religion of the Christians and the religion of the Jews’. — Norman Daniel, Islam and the West, 142