For once, this sure-of-himself agitator with a camera is of two, three, many minds on an issue. He hates gun violence, and shows through interviews, slide shows and cartoons how Americans pursue blood lust at the point of a rifle barrel. But Moore loves guns! He's an NRA member who won a marksmanship award in high school. This confliction, along with a born entertainer's skill at manipulating images (and statistics), makes Columbine Moore's richest tragicomedy yet — and the top-grossing documentary ever.