Not sure how it is in the US, but antifascist groups in Europe, including the term "Antifa" are far older. The origins go back into the 1920s to Marxist and Communist groups that were fighting the then-fledging fascist movements in Italy and Weimar Germany. (Also heavily influenced by the Spanish Civil War)
Later in the 70s, left-wing groups who saw themselves as part of the civil-rights movement adopted the name to fight against neo-nazis and old nazis that were still in power after the war (often with plenty of help by conservative circles in Europe and the US). Many of those groups saw themselves as Marxists and some where sympathizing with the Soviet Union, or might even have received support from there. But the "idea" was their own - or, if anything - came from the US, through the civil rights movement.
I don't know much about the modern Antifa groups in the US, but I imagine they, in turn, got "inspired" by the groups from the 70s.
Not sure how it is in the US, but antifascist groups in Europe, including the term "Antifa" are far older. The origins go back into the 1920s to Marxist and Communist groups that were fighting the then-fledging fascist movements in Italy and Weimar Germany. (Also heavily influenced by the Spanish Civil War)
Later in the 70s, left-wing groups who saw themselves as part of the civil-rights movement adopted the name to fight against neo-nazis and old nazis that were still in power after the war (often with plenty of help by conservative circles in Europe and the US). Many of those groups saw themselves as Marxists and some where sympathizing with the Soviet Union, or might even have received support from there. But the "idea" was their own - or, if anything - came from the US, through the civil rights movement.
I don't know much about the modern Antifa groups in the US, but I imagine they, in turn, got "inspired" by the groups from the 70s.
https://en.wikipedia.org/wiki/Antifa_(Germany)