Marsha Lederman is a Vancouver-based columnist for The Globe and Mail. Her latest book is October 7th: Searching for the Humanitarian MiddleMichael Sachs pulled into the synagogue parking lot in his GMC Sierra Elevation, took off his Stetson and picked up his transparent tallit bag, containing his Jewish prayer shawl. On his way into B’nai Emunah, also called “The Synagogue,” he fist-bumped the armed security guard, and once inside, replaced the cowboy hat with a kippa. Open this photo in gallery:Michael Sachs at the Jewish Federation of Tulsa in Tulsa, Okla., on Sept. 28. Just over a year ago, Mr....