Not long ago, I was getting my hair cut, and I mentioned to my stylist—someone I love who has faithfully attended good Bible studies for two decades—that I was embarking on a press junket to Germany this month. My reason: to visit some of the “Martin Luther” sites, with a view to writing some religious-travel articles. Why now? Because in 2017, we'll mark the five hundredth anniversary of Luther’s nailing his 95 theses to the Wittenberg (“Vittenberg”) Door. In the time that followed with my stylist, she asked some good but basic questions that made me realize how little church history we teach. So here’s a tutorial to read and…