It’s been seven years since the last time the lack of speaking roles for persons of color was so devastatingly exposed. The previous vehicle was “Tropic Thunder,”a 2008 spoof about the men who attempted to make a movie about a rescue mission undertaken during the Vietnam War. Robert Downey Jr. plays Kirk Lazarus, a blond Australian actor who undergoes a “skin-darkening procedure” in order to portray an African-American character, Sergeant Lincoln Osiris. Lazarus’s politically-incorrect embrace of faux “trans-racialism” so irritates the actual African-American actor, Alpa Chino (played by Brandon T. Jackson), that he finally blurts out: “Why am I in this movie? Maybe I just knew I had to represent, because they had one good part in it for a black man and they gave it to Crocodile Dundee.” Later on, still in character as the black sergeant, Lazarus passes himself off as a Vietnamese rice farmer who only speaks Mandarin.