Good points Lilo.
For that matter, what NY Mafia family ever had just two capos,or murdered a police captain in the middle of a restaurant,or had the undisguised son of a Mafia don commit that murder, or had an Irish Consigliere, or wiped out a bunch of NY dons in an elevator, in a revolving door, or on the steps of city hall? As Lilo stated: it's a movie!