That's a pretty heavy claim. The Musitanos were believed to be friendly with the Rizzutos and they had multiple dealings with Francesco Arcadi. Vito Rizzuto allegedly backed the Musitanos for killing Papalia so they could take over his rackets and gain power in Hamilton. Ofcourse mafiosi are threacherous and opportunistic and alliances shift all the time. When I read that Montagna made trips to Hamilton I assumed that he visited the Luppino-Violi family, who were enemies of the Rizzutos. Is it possible that he approached the Musitanos as well? They aren't mentioned as conspirators in Business or Blood, that goes in-depth on the 'Ndrangheta's involvement and Montagna's dealings.