I think it's great if local languages and identifies can continue to thrive, but I don't think it can be said that Italian nationalism isn't a thing though - it has explicitly been a thing as the suppression of regional dialects and the 'making of Italians' was a stated objective of Italian nationalists immediately after the unification of Italy.
btw this does not make Italy exceptional in any way, the way modern 'nation states' were built followed exactly this pattern - suppression of regional languages - 'cultural genocide' - and the creation a new national identity to replace them