This is one of the reasons Castellano was relunctant to give Roy DeMeo his button. Cause of his neapolitan ancestry. That and he was a crazy motherfucker involved in alot of street crime. Castellano was said to prefer more low-key rackets like labor racketeering and the like
I think you'll find there's a history of Neapolitan inductee's into the Gambino Family, and that the second reason you listed was more the case. Gaggi used the Neapolitan angle as a bullshit reason for why DeMeo could not be made an official captain, despte him being the leader of his own crew anyway.
yeah the founder of the casalesi clan for example was made into sicilian family if im not wrong.
Yes. Antonio Bardellino.
Were there not a few other Camorristi inducted into Cosa Nostra during the 1980's as a way of ensuring loyalty in regards to joint cigarette smuggling or 'buttlegging' rackets? I may be wrong, the names escape me for the moment.