I think they hate and kill for the sake of hating and killing, If their cause was just they would make it perfectly clear why they bomb an kill an mutilate innocent people of all races and religions. But we know the killing of innocent people of all races and religions is unacceptable for any cause. They should do their homework first and focus their grievance at the appropriate governing organisations in a peace full manner, this is more lightly to gain them favour and victory,