Tuesday’s massacre in a Texas elementary school pierced parents such as Fred Guttenberg, father of Parkland shooting victim Jaime Guttenberg. Like Nicole Hockley, whose 6-year-old son Dylan was gunned down at Sandy Hook Elementary School in Newtown, Conn., in 2012, Guttenberg found himself thrown back in time. Jaime, 14, was shot down as she fled the gunman in the halls of Marjory Stoneman Douglas High School on Valentine’s Day 2018, in Parkland, Fla. On Tuesday, 19 students and two teachers were killed by an 18-year-old gunman in Uvalde, about 80 miles west of San Antonio. “It just pulls me b…
