
Factual error: When Amsterdam kills the man that shot Bill the Butcher in the shoulder at the theater, you can see bananas on the floor. Bananas were traded in the U.S. only after the Civil War. (01:13:50)

Continuity mistake: After Jenny gets mugged at the dock, the shot shows her pulling herself to a standing position on a crate. In the next shot, from farther back and up high, she is crawling over to the crate she just pulled herself up on. (02:20:55)

Continuity mistake: When Amsterdam arrives in New York City and is talking to his new friend, the bag he is holding switches from being held under his arm (camera shot from front) to being carried on his back (camera shot from the back). This happens at least four times in a row during the same scene. (00:22:55)
Answer: Because he's very racist. That's why the audience hates him. He's very racist.