The coming of the Crusades (starting with the massacre of Barbastro) and similarly entrenched positions on the northern African Almoravids, who took over al-Andalus as of 1086, added to the difficult coexistence between communities, including Muslims in Christian ruled territory, or the Mozarabic rite Christians (quite different from those of the northern kingdoms), and further minority groups. The Almohads, a fanatic north African sect who later occupied al-Andalus, were the only Iberian Muslim rulers to demand conversion, exile or death from the Christians and Jews.[43]