The photo, taken in 1935, depicts a woman in a dark dress shuffling down a street in Norden, Germany. A large sign hangs from her neck: “I am a German girl and allowed myself to be defiled by a Jew.” She is surrounded by Nazi stormtroopers. D.C. Council member Trayon White Sr. (D-Ward 8) studied the image. “Are they protecting her?” Lynn Williams, an expert on educational programs at the U.S. Holocaust Memorial Museum and White’s tour guide for the day, stared at the photo. “No,” she said. “They’re marching her through.” “Marching through is protecting,” White said. “I think...