I seriously doubt Desjardins has any worries about repercussions for killing Montagna other than from the Mounties. The Bonanno's are not after him, it's the Sicilian's in Montreal that he will have to worry about. Mirarchi is his only shot at living. But him killing a made member doesn't mean shit in Montreal anymore unless the guy was a Rizzuto or Ndrangheta.
Yes Mirarchi is the key guy and you also have the Neapolitan Felice Racaniello.