Continuity mistake: When the second battle in Paradise Square is about to begin, Vallon is holding a length of chain in his left hand. Shang, standing beside him, is carrying a pole with dead rabbits hung from it. In a later shot, just before the naval bombardment, Vallon is holding a knife in that hand while Shang is now holding the chain. (02:28:30 - 02:29:55)
Factual error: The lords are playing Snooker in a scene. This movie is set in 1862. Snooker was not invented till 1875.
Answer: Well, rather obviously, Amsterdam hates him because he killed his father. I mean, wouldn't you? It hardly matters that the fight was fair and that Bill showed respect about it, Amsterdam's not exactly likely to turn round, say "oh, that's alright then" and walk away. William Cutting (or William Poole, as he was in reality) was a ruthless, vicious man, who pretty much stopped at nothing to cement his control of the area. Whether he was actually worse than many of the others is questionable, but the film is based on Amsterdam's view of things - in that view, Bill is the enemy and we're supposed to see him as such.
Tailkinker ★