Antifa or the Anti-Fascist party has its roots in the German Communist Party. After the Rise of national socialist Germany, the founders of the German Communist Party founded "Antifaschistische Aktion".
And the modern-day Antifa takes a 1000-cuts terrorist position. They purposely avoid killing people to stay out of public attention, but they are known to exist and people do cave-in to their fear of them and will silence those who stand against them to keep themselves safe. Despite the fact that they stand against Fascism, they seem to take the same tactics of fascism and push them forward to gain power. Only instead of doing it for Fascism, they do it for Communism.
Sure, they're Anti-Fascist... but only because they're Pro-Communist.
And last I checked, there are no Fascist Parties that aren't obscure and publically denounced.
And no, calling people you don't like Fascists does not count.