Noticing a sixth-grade boy crying during a lesson on the Holocaust, a Butterfly Project educator once asked his teachers about him. The history session opened the boy’s eyes to the ramifications of his own antisemitic activities at the school and his disbelief in the Holocaust, recalled Arlene Keeyes on Friday. “He was just pretty, pretty shook up that he had done this,” said Keeyes, a staff member with The Butterfly Project, a 16-year-old San Diego-based charity that raises awareness about the systematic murder of Europe’s Jews by the Nazis during World War II. She said the boy was remorseful to...