As we approach the Jewish New Year, or Rosh Hashanah, and subsequent High Holidays, Jews across America will gather in synagogues and homes in the largest numbers since the antisemitic hostage crisis at a synagogue in Colleyville, Texas, in January. Security is a critical priority at a time when antisemitism in the United States is on the rise. Last year saw a 34 percent jump in antisemitic incidents nationwide, according to an ADL audit. Though Jews make up only slightly more than 2 percent of the U.S. population, recent FBI statistics document that nearly 60 percent of all religiously motivated...