By Caleb Guedes-Reed and Gabe Friedman The flames of the “Jewface” debate have been fanned for years, but the conversation hit a new level of prominence last fall. Kathryn Hahn’s casting as the outspokenly Jewish comedy pioneer Joan Rivers in a TV series (which was eventually dropped) and photos of Bradley Cooper wearing a prosthetic nose to play Jewish conductor Leonard Bernstein in what should be a blockbuster film have added fuel to the discourse over whether non-Jewish actors should be cast as Jewish characters. The latest who could get caught in the crosshairs? Steve Carell. The non-Jewish actor plays...