As an American of Irish descent I could never give it a good review. My understanding is that both mob associates and labor leaders are pretty diverse. The fact that this character has an Irish name never became relevant in the movie let alone so relevant that it warrants being the title. He could have just as well been German, Polish or Russian.
I will reserve the rest of my review but it wouldn't have been a good one. Too bad because I am a De Niro, Pesci, and Scorsese fan and I consider Pacino the greatest actor of his generation.