It was ten years ago that filmmaker Guy Nattiv felt ready to direct what he calls the “most personal movie I’ve done in my life.” But it took that full decade to get it to the screen. The director, who won an Academy Award for his short film Skin and then went on to direct a feature of the same name, as well as films such as the Golda Meir biopic Golda, wanted to tackle a film inspired by the story of his grandmother, a Holocaust survivor who, in her middle age in the 1980s, joined a cult and made...