Italian-American actors
As an Italian, it terribly annoys me that they keep using Italian-American actors who can't speak Italian to play the part of the mafiosi.
The film is set in the '60s, so I guess an Italian-American at the time could still speak Italian (or at least a dialect), why didn't they get an Italian actor for the part instead of Chazz Palminteri? Why don't ask one of the tons of Italians in London to teach Palminteri how to say "salute"?! That put me in a bad mood for the rest of the film 😀