Fascism is pretty easy to define once you cut through the bullshit, Fascism is just Socialism, or Post-Syndicalist Nationalist Socialism to be more encompassing of historical context.
https://youtube.com/watch?v=ksAqr4lLA_Yhttps://youtube.com/watch?v=eCkyWBPaTC8https://youtube.com/watch?v=06vJY9nLMXUYes, Mussolini's Socialism/Fascism is explained in the Hitler was a Socialist video. All good shit, I hope you have some spare time on your hands.
So yes, Joseph Stalin behaved like Mussolini in that they both seized the means of production, except that Mussolini was nationalist while Stalin was a globalist, but that's just because Socialism, Fascism, Communism all belong to the Marxist family of sub-ideologies.