North Italy especially had a very revolutionary tradition, throughout various periods there were more communists than liberals, especially after the russian revolution, and during the 1950s-70s. It was one of the main fronts of the cold war, which is why the CIA put so many resources into killing them during the years of lead and stamping out their orgs via gladio.
The Italian and other southern and eastern european expats to the US during the early 1900s formed the core of most of its communist / socialist organizing too. They were highly-communitarian minded people, pretty much the opposite of anglos.
Highly recommend comrades read Paul Williams - Operation Gladio.