John Zachary created a Nativity scene for Claremont United Methodist Church that employs a figure of Trayvon Martin as a commentary on gun violence. Previous scenes have had Mary and Joseph as a homeless couple and as war refugees. “You try to put it in a context of how it would be today,” Zachary said.Nativity scenes have a few standard elements: a manger, swaddling clothes, happy parents, sheep, maybe the Three Wise Men. They don’t generally include Trayvon Martin. But there he is, wearing a hoodie, a stream of blood pouring from his chest onto the straw-covered floor of the...