It's not the Rizzutos hitting back, it's the same group who's been doing this since day 1.
It was not the same "group" anymore because Montagna was previously also part of it.
Montagna was part of a group, most likely new Sicilians backed up Ontario. The same group is still gunning for them, eliminating any rebellious factions who don't fall in line.
Montagna, Lopresti and Desjardins were the result of wanting to break off I believe.
