“Mel Gibson can be accused of many things, but subtlety is not one of them. Even at his worst — I mean as a filmmaker, not a political thinker — he consistently proves to be an able craftsman and a shrewd showman. “Hacksaw Ridge,” the first feature he has directed since “Apocalypto,” a decade ago, is a bluntly effective faith-and-flag war drama, the true story of a remarkable hero with a knot of moral tension at its center.” To read more, click here.