Arnaud Amalric, Papal legate who allegedly promoted mass murder
Arnaud Almalric (Latin: Arnoldus Amalricus; died 1225) was a Cistercian abbot who played a prominent role in the Albigensian Crusade. Prior to the massacre of Béziers, it was reported that Amalric, when asked how to distinguish Cathars from Catholics, responded, "Kill them all! God will know his own."