I just read an article that the whole Ontario/Hamilton was under Buffalo, than the Mustiano's came into town and aligned with the Rizzuto's.

The Rizzuto's, had a beef with the two Hamilton family because they borrowed $7MM from him and didn't pay him back.

That was the reason Papilia and Barillo got whacked.

After that the factions were never than taken over by Rizzuto so they were left alone.

They must have made peace with the Mustiano's for as long as they had to.