@sun

I think the best foundation to conceptualise it is in the context of the Italian Futurist art movement, which valorized themes of violence, strength, speed, modernism, etc. Basically the "move fast and break things" of the political spectrum.

Since Mussolini (notwithstanding Margherita Sarfatti) was the original architect of the identity, there's definitely also nationalism, and romanticising of the golden era of said nation, as well as investing the national identity with all spiritual authority over and above any religion or individual, and of course corporatism. But once you look at all the historical implementations and interpretations of fascism, the definition starts to fall apart rapidly since they all emphasise or adopt and dispense with additional features (eg. ethnicity, religion, etc) in a rather ad hoc fashion to suit their particular aims.