Well. It probably should have been expected. After winning the Golden Globe for best screenplay, Quentin Tarantino went on to drop the N-word at his press conference after the show.
Quentin Tarantino is tried of discussing the violence in Django Unchained and he is certainly tired of discussing that violence in connection with real-life violence such as Newtown, Connecticut. The questions became too much and Tarantino goes off on a reporter.