Much of the credit for the deep impression Bill leaves on the audience is due to Jay Cocks, Kenneth Lonergan, and Steven Zaillian, who wrote Gangs of New York's Oscar-nominated screenplay. But there isn't another actor working today who could have done the job Daniel Day-Lewis did with a role that is, on paper, so unsympathetic, and yet is the linchpin of the whole film. His phenomenal performance poses a challenge to every other actor in the production, and few of them are up to the task -- certainly not the feeble Diaz; not DiCaprio, who is certainly more convincing as a 1960s con man (in Catch Me If You Can) than an 1860s thug; not even the generally excellent John C. Reilly. Apart from Liam Neeson, Jim Broadbent, and Brendan Gleeson, none of the principal cast members is credible opposite Day-Lewis. He makes the enormous sequence of choices that compose his performance as Bill look so effortless that the other actors, concentrating on their poor Irish accents or complicated undergarments, really show the strain of all the ack-ting they're doing. (Particularly Diaz. She's really just so terrible and it can't be said enough.)
I have seen a goodly portion of Day-Lewis's twenty-one movies, and I have never seen him play the same role twice. (One cannot say the same of his fellow Best Actor nominee, Jack Nicholson -- who is heavily favoured to win the award this year.) Recently, I watched Day-Lewis again in A Room With a View, in which he plays Cecil Vyse. Cecil is the Merchant Ivory version of Obstacle Guy -- Helena Bonham Carter's Lucy Honeychurch gets engaged to him because she's confused and upset by her actual feelings of love for Julian Sands's George Emerson. (If I may digress for a moment: I first read the novel on which the movie is based several years after the movie was released. I knew who was in the cast of the movie, but I mistakenly swapped Sands's and Day-Lewis's roles in my mind, and I submit that Day-Lewis would have been just as good as the taciturn, intense George, who is positively transformed by his love for Lucy. It could have been like that production of True West where John C. Reilly and Philip Seymour Hoffman traded roles each night: only really great actors can take on a challenge like that.) Anyway, if the brutal, carnal maniac Bill the Butcher is at one end of the spectrum, Cecil is at the other: he's a prissy, effete, insufferable snob who is plainly wrong for Lucy. None of the people in his circle is up to his high standards (including his fiancée), and the only activity that appears to give him anything resembling pleasure is making fun of badly written books. Say what you will about Bill the Butcher -- that he's a power-mad xenophobe, blah blah blah -- but at least he isn't an anhedonic prat like Cecil. There's a world of difference between the characters of Bill and Cecil, and Day-Lewis is no less convincing in one role than the other.