In 1839, the Abb¿acques Suchet was sent to the Algerian city of Constantine, recently conquered by French forces, to minister to the new French colonial population there. He commented favorably on the Arabs'' Muslim religiosity, perhaps seeing them as fertile ground for missionary work. In the mid-1870s, when the Abb¿dmond Lambert toured another colonial Algerian city, he recorded that Arabs were inherently "liars, thieves, lazy in body and spirit" and that even their seeming piety was insincere. In the space of less than forty years, some French Catholics went from viewing Muslims in Algeria as fellow religious devotees, potential converts, and allies against French secularism to viewing them as enemies of civilization. Sacred Rivals focuses on French Catholic ideas about Islam and Arab-ness-"Catholic orientalism"-in the context of religious culture wars in France and of missionary work in colonial Algeria. It examines the way the stereotype of "Islam" was used and abused in religious