<P> Arnaud Amaury (Latin: Arnoldus Amalricus; died 1225) was a Cistercian abbot who played a prominent role in the Albigensian Crusade . He is remembered for purportedly advising a soldier who was worried about killing Catholics instead of just heretic Cathars, prior to the sack of Béziers, to simply kill everyone, as God would sort it all out later . </P> <P> He was abbot of Poblet in Catalonia from 1196 to 1198, then of Grandselve from 1198 to 1202 . He then became the seventeenth abbot of Cîteaux (until 1212). </P>

Who said kill them all let god sort it out