You are aware it's a work of fiction, right?
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.
“You are aware it’s a work of fiction, right?”
Cute. You are aware that it’s historical fiction based on real events, right? Star Wars isn’t, just so you know.