Germans pass the smashed windows of a Jewish-owned shop in the aftermath of Kristallnacht, which happened Nov. 9 to Nov. 10, 1938, when more than 200 synagogues were destroyed and thousands of Jewish homes and businesses were ransacked. (Universal History Archive/Getty Images) I didn’t think anything needed to be said. “Rabbi, how could our congregation not do anything to commemorate Kristallnacht?” Nov. 9, 2015, didn’t fall on a Friday night, and, at our Shabbat services that week, we made no mention of that horrifying historical event. With all the dates crowding the Jewish calendar, it simply didn’t feel necessary to...