We need to thank the unsung heroes keeping American synagogues safeLast Shabbat when I arrived at my synagogue, I greeted our CSS volunteers and one of them pointed out that in the wake of the horrific attack in Jersey City days earlier.A crowd attends a vigil outside the Tree of Life synagogue Tree of Life synagogue, marking one week since a deadly shooting there, in Pittsburgh, Pennsylvania, U.S., November 3, 2018(photo credit: ALAN FREED/REUTERS)