I was suspicious too,but they all know much more than you or me,also tag(known to you as carmela) on another forum posted:

Vito was always supported by the Gambino's. In Sicily, the Inzerillo-Spatola-Di Maggio-Gambino clan has always been close to Caruana's and [BadWord]'s. Even Frank Cali' has close ties to Caruana's and [BadWord]'s in Sicily.

And she is very trustworthy about Sicily and generally things happening in Italy.I don't say this is 100% true,but it is very possible.