This is one of the truest statements I've read on here.

Sicilian mafioso that are here in the US (and by Sicilian, I mean born and raised in Sicily) have little to do with Italo-American mafia anymore. They don't care that your father's mother is from Sicily, blah blah blah. To them, you're American and that means they don't trust you and in fact, they make jokes about american mafia (you understand why).
They come to the US and seek out their own, to do business with their own, from their very own town in Sicily ideally, and they are the only ones they trust and will do business with anymore. The American mob are pretty much flying solo these days with little to no connection to homeland in Sicily.

There are a few still around, Frank Cali is one, but he's born in the US, anyhow.