“The Ten Commandments” (1956) has kept several generations of kids glued to the TV around Passover and Easter time, but Cecil B. DeMille’s epic is rarely taken seriously. Seen on a small screen, faded, panned and scanned, interrupted by toothpaste commercials, it can look pretty corny. But a 2010 restoration revealed the film to be, for all its well-known flaws, as visually splendid as a medieval cathedral, created like a cathedral by a brilliant team of faith-inspired artists and craftsmen. Seen on a big screen or on Blu-ray, minus the toothpaste, the restored movie stakes a claim for itself as a major work of religious iconography, a populist Sistine Chapel. Cecil B. DeMille (1881–1959) began in the theater, acting and writing. He shot his first movie in a rented barn: “The Squaw Man” (1914). Fame and success came quickly. In 1922, he invited fans to write in with suggestions for …