 The new faith, in its various forms, would penetrate nearly all segments of Berber society, bringing with it armies, learned men, and fervent mystics, and in large part replacing tribal practices and loyalties with new social norms and political idioms.Nonetheless, the Islamization and Arabization of the region was a complicated and lengthy process.Whereas nomadic Berbers were quick to convert and assist the Arab conquerors, it was not until the twelfth century, under the Almohad Dynasty, that the Christian, Jewish, and animist communities of the Maghreb became marginalized.