alt Hacker NewsI'd suggest that radical left-wing elements indigenous to Italy, such as those behind the Turin protests that left 100 police officers wounded a few days ago, are a perfectly plausible candidate; not every attack comes from without. There was another protest against the Olympics in Milan itself last night by left-wing elements who believe the games are economically and socially unsustainable [0]
[0] https://www.cnn.com/2026/02/07/europe/italy-protests-rail-da...
Unfortunately with stuff like this, nation states will use groups like that as proxies.
Lots of governments.
For example, there's some other news at the moment that the USA is financing pro-MAGA groups across Europe, which I mention more because of Jan 6 happened at all than due to any specific evidence that the US government has knowingly given state support for terrorists.