The Struggle to Make Sense of the Deadly Attack at a California Synagogue

John T. Earnest, 19, surrendered to a police after bursting into Chabad of Poway, north of San Diego on Saturday and opening fire with about 100 people inside, killing Lori Kayne, 60, and injuring Rabbi Yisroel Goldstein, Noya Dahan, 8, and Almog Peretz, 34, authorities said.