The Iron Claw director Sean Durkin on the hardest decisions he made while telling the tragic (and true) story of wrestling’s Von Erich brothers. Photo: Eric Chakeen Unlike so many “based on a true story” movie offerings aiming for the Oscars this time of year — you know, the type of biopic that resorts to historical lily gilding and sometimes outright fictionalizes the lives of its subjects to pump up the prestige drama — writer-director Sean Durkin’s A24 wrestling tragedy, The Iron Claw, (which arrives in theaters December 22) takes notable effort to lessen the concussive impact of its real-life...