Mussolini did a great job as delineating exactly what fascism was, and the NSDAP fit it, but in general it really doesn’t fit states outside of that particular time and place, including most regimes described as ‘fascist’ today.
The arguments for why Trump is somehow a fascist are among the most facile I’ve ever heard, and I say that having never voted for nor supported Trump, and having even more negative an opinion of him now than I did previously.
Political discourse will never be anything beyond laughable until we can get past screeching at each other over which side is the secret fascist.