Especially when the multilingualism and multiculturalism is only a result of fascist projects like making Italians move there, making the local language illegal, forcing everyone to learn the new ruler’s language, teaching different history in school (that South Tyrol had actually been a part of Italy that they “finally gained back” in WW1)… Fascism doing fascism things. Mussolini even made people create Italian names for places that never had an Italian name just so they can Italianize it (and to this day in English people usually use those Italian names).

South Tyrol hasn’t had as many rights as today until the 70s (so ~30 years after Italian fascism ended) which is why many South Tyroleans still are very hostile towards Italians, having experienced Italian suppression themselves. And they only gained those rights after excessive protests (including violence and blowing things up).

tl;Dr Explanation for my previous comment, why it’s often not a good idea to speak Italian in South Tyrol

(Especially in the less-Italianized regions; there are a few areas that they successfully Italianized - German speaking population went from nearly 100% before the end of WW1 (and a few percent ladinian) to just a bit over 70% today thanks to decades of suppression under Italian fascism.)