KOUNTZE, Tex.—The cheerleaders in Kountze, Texas, have been painting Bible verses on the banners they hold up at football games for nearly four years. Players line up on Friday nights behind a big stretch of unrolled butcher paper, busting through it as they run onto the field. Instead of a negative slogan, along the lines of “Kill the Tatum Eagles,” the girls wanted to write messages that were more positive, ones “that were really encouraging and honorable to God,” as one of them put it.