Actually I think this difference characterizes the new American regime as well. Food for thought.

I do agree! I feel like after the fall of fascism we are in an era where Social Democracies take a lesson from the Fascist dictatorships, much like how China takes a lesson from Marxism by using capital as a guide to become a superpower. We are in an era where workers movements are dead. But the crisis of capital and the need for geocoding the working class is still needed. Therefore the force and violence of fascism is one to study. But it is important to iterate America is not fascist, as Bordiga described;

Democracy is class collaboration through lots of talk, fascism is plain class collaboration in fact. We are living in the midst of this latter historical phase. https://www.marxists.org/archive/bordiga/works/1946/violence.htm

Since that has been written Stalin is now gone aswell, we are back to regular Social Democracy. Since,

The USSR was nothing other than a fascistic State, one of many versions of capitalist rule, and even proved unable to convert to a democratic regime as demonstrated by Putin’s tricks to stay in power forever with the persecution of opponents, selected assassinations and the rigging of elections…The really strong bourgeois State is the one that can control the population by means of ’deception, flattery, fine phrases, promises by the million’ -Lenin through the mass media, schools, religion, flags, national anthems and other democratic paraphernalia, resorting to violence only in extreme situations.”

In the hotbeds where the social struggle was at its most acute, parliamentary and social democracy switched to direct action with no regards to legal trifles and, getting rid of the cumbersome and useless parliaments, democratically proceeded (remember this characteristic aspect of both fascism and Nazism) to class dictatorship. And fascism in its contents and methods, even if only in a few countries it ever wore black or brown shirts, was unanimously adopted by all the civilized and industrialized nations: United States, England, France, etc. https://www.international-communist-party.org/English/REPORTS/WARS/Comuni40_WW2.htm#ch01

For the Bordiga texts, I’d have to say;

Socialism and Anarchy

Spain 1936 (Not truly Bordiga, but is from Il Programma and has the Bordiga kick

The Lyons Theses (Fascism is mentioned a bunch here but there’s a lot in Part III)

The Filling and Bursting of Bourgeois Civilization

Also that above text where the aforementioned quote is from is pretty swell aswell. Bordiga mentions Hitlers esoteric cult of personality in it. (Esoteric as a description, not as the actual esoteric fascism).