Most likely the alliance would of been struck in Southern Italy via lodges/masonry, or at least via Southern Italians that ascribe to those beliefs.

Rizzuto are West Coast Sicily, specifically Agrigento, there was a high concentration of West Coast Sicilians that immigrated into Hamilton specifically, from Agrigento in the early 1900’s.

There were Figliomeni that were either using the last name Ross or Romeo, two brothers Frank and Mike, that were Rocco Perri/Railway Street. As well, as many Sicilians from Agrigento, specifically Racalmuto, which is a sister city of Hamilton via the United Nations. Bordinaro , Agro, Speziale, Sylvestro/Silverstri are a couple names, I’m capable of recalling.

These Sigs from Agrigento, were instrumental in ratifying CN in 1931, tied to the other side via the Church and Masonry. When the original 5 families were created, it included all Southern Italians, not just Sigs.

So a thread between the Figliomeni and West Coast Sigs from Agrigento, like Rizzuto, could have been in place for over a 100 years in Canada, through the other side of the Atlantic. If a deal was struck, this could be a thread that was used.