center for campus involvement announced cancellation tuesday in response to complaints about portrayals of arabs in the film .
sophomore lamees mekkaoui started a petition saying the subject of the film , late navy seal chris kyle , was ` mass killer ' and ` a racist '
university apologized and said american sniper will be replaced at friday 's mixer with pg-rated children 's film paddington .
conservative student group started competing petition calling on u of m to screen the iraq war drama .
football coach jim harbaugh weighed in and said the team was ` proud ' of chris kyle and would screen the film for players .