Bring it back?
Italians need to have families of 6+ children again...
Even if they did Little Italy would still go away. People off the boat use to live in the same area so most could live without having to learn the language and culture of their new home. (Sorry guys just the facts!)
By the time they reach the third generation they have assimilated and moved away. They can speak the language and have adopted the culture. They have no further need to stay.
The need having vanished, the institution dies.