These days, in some families (Genovese, Gambino) you still have to be 100% Italian to be made.
In those weaker and smaller...on your dad's side.
You don't have to prove your roots. Your lastname is either Italian or isn't.
And most guys that get involved are from the same areas\neighborhoods.
That is no longer true at all and it's a myth. If they only limited it to people who are as you put it "100% Italian" nobody would be able to join in the United States or in other countries besides Italy.
Granted yes you do have to have an Italian heritage/background but you do not have to be fully Italian, or have an Italian heritage on only your father's side.
