The Duke’s widow, Pilar Wayne, said her husband “would become a ‘superpatriot’ for the rest of his life trying to atone for staying home,” but that doesn’t quite come across in this three-hour slog. Long-winded and touting the virtues of rugged individualism and evils of communism, “The Alamo” feels more like score-setting than atonement for a man who resented his lack of service.