Would the marriage between a Cannibal and a Vegetarian be able to work?

BEFORE you report me . Heres why I ask. My sister met a guy that is some kinda Africa Prince. He still lives over there and come to find out he is a Cannibal, but only "certain" types will he eat. Something about the enemy as they believe that when eating the enemy they "get their powers". My sister is a PURE vegetarian. WIll their marriage be able to work?