Hitler in 1919 took a position in the Communist run Bavarian Soviet Republic, wearing in public a red armband, according to a number of historians in… - L.K. Samuels

Italian Fascist theories of corporatism arose out of revolutionary and national syndicalism that often paralleled the activities of the trade unions, craft guilds and professional societies. Mussolini acknowledged Fascism’s socialist roots and influences. Among those whom he acknowledged as influencing Fascism were French Marxist Georges Sorel and French Revolutionary Unionist Hubert Lagardelle. Moreover, Mussolini was a union man: he decreed mandatory unionism for all Italian workers. It is true that Mussolini banned strikes, but Lenin had done the same in the Soviet Union.

If socialist regimes work together, trade together, fight together, collaborate, and have fundamentally equivalent ideologies and tactics, they are genealogically related (a sort of Communist-Nazi brotherhood), which could be regarded as a Fascist-Marxist mindset. Of course, these socialist ideologues also fight each like rival siblings.

Under complexity science, the more interacting factors, the more unpredictable and irregular the outcome. To be succinct, the greater the complexity, the greater the unpredictability.