A pair of graphic designers say they thought it would be funny to misidentify a Russian Orthodox church as "The Mosque" on a tote bag that displays a map of Williamsburg landmarks. But the church isn't amused. Derick Holt, 30, and Milton Carter, 33, both of Greenpoint, Brooklyn, said they considered it "ironic hipster" humor to deliberately mislabel the Russian Orthodox Cathedral of the Transfiguration on North 12th Street. "That's just what everyone calls it, as in 'Let's meet at "The Mosque" side of the park,' " said Carter, who, along with Holt, runs a business called Brooklyn Novelty. "If...