This year, for International Holocaust Remembrance Day on Jan. 27, I joined the Congregation Beth Israel of Merrimack Valley’s book discussion of “People Love Dead Jews” by Dara Horn, exploring why antisemitism continues. Twelve days before, on Jan. 15, during Shabbat prayer, a gunman held four hostages in a standoff that lasted 11 hours at Congregation Beth Israel in Colleyville, Texas. The terrorist act was a hate crime, the FBI stated emphatically. Surged by 60 percent in 2017. What is happening in America right now is not just a crisis for Jews. It is a crisis for this nation as...