In short, the de-Nazification of the Germans became the anti-Fascist movement (the birth of Antifa), which became the anti-German movement, which became the anti-Britain/France/America movement, which became the anti-White movement.
Exactly.
But it was the Italian government that was fascist, and Antifa practices fascism tactics itself. Nazism isn’t the same as fascism.
Antifa was in Germany from the 1920s. It was the paramilitary arm of the Soviet-aligned Communist Party. It used the same tactics then, and caused people to support the Nazis as the only group willing to fight them.
The Nazis (National Socialist German Workers Party), the Communists, and the Italian Fascists were all just different flavors of socialism.