Scorsese has always been unafraid to show his audience the parts of the world that feel better left in the shadows. It's this very quality that usually got him exiled. Whether it was the moral outrage of Goodfellas, which got the Maestro banned from the Italian diner's favourite, Rao's, in New York or the legions of Catholics who turned their backs on him when he adapted Nikos Kazantzakis' The Last Temptation of Christ. Alienation from the tribe is something Scorsese…