She was the perfect American neighbor — sweet, hardworking and the ideal homemaker. Everybody liked her. She was also a Nazi. The new movie “The Housewife,” which had its world premiere this week at the Toronto International Film Festival, tells the strange story of Hermine Braunsteiner Ryan, a notoriously cruel Nazi death camp guard who hid out undetected for years in New York, before finally being caught. Director Ben Shirinian’s film, starring a Stepford-style Naomi Watts as Ryan, is just OK. The drama is often overplayed. Watts, with a store-bought sauerkraut accent, has been stuck in schmactor mode lately. And...