From the article: "The historical record shows many instances in which the Mafia fought against the Peasant Fasci and collaborated with the military in suppressing protests and killing protesters."

However, according to Wikipedia: "Some historians emphasize that the leagues were engaged in class struggle against a coalition of landowners and mafiosi and ignore evidence of strategic alliances between the Fasci and the Mafia."

https://en.wikipedia.org/wiki/Fasci_Siciliani#Mafia_involvem...

I wonder which is it. Perhaps the Mafia was opportunistic and would ally with the Fasci (the workers) or the landowners depending on the local conditions. Its not like the Mafia is one single entity but composed of smaller (themselves warring) factions.