You really need to educate yourself, ok? The Gangs of New York was taken from a non-fiction book (as well as the books of Luc Sante). And why you think that fiction does not reflect truth just shows you are having trouble with this subject. That movie is an explosive closeup of Tammany Hall and the degraded Irish immigrants who came to this country. They were called “wild” for a reason and they were not unlike the ghetto rats of today.
It was a Hollywood movie. All five point thugs did not look like Leonardo DiCaprio. All five point hookers did not look like Cameron Diaz. I suppose that next you'll be using "Outlaw Josey Wales" to teach us about the Kansas/Missouri Border War.
The Leo DiCaprio character is a complete fiction. The real Bill the Butcher was dead almost a decade before the riots. The Old Brewery was torn down even before that. Unlike the movie, there were virtually no Chinese in New York until after the Civil War. And that's just a start of what the movie gets completely wrong.
Frankly, serious historians don't put much stock in Asbury's book, The Gangs of New York , either. He was more of a journalist cranking out pop nonfiction than he was a historian.