You don't really understand what this is about. The original antifascist movement was about using communism to fight fascism (also known as national socialism, BTW). That is, communist totalitarianism vs capitalist totalitarianism. It was a Stalinist movement. The current "Antifa" pretty much quote The Internationale [1] as their position, without even knowing what it is, or that they are quoting it. This ignorance would be humorous, were it not so dangerous.
To quote wikipedia: Antifa (German: [ˈantifaː]), was a militant anti-fascist organisation in Weimar Republic started by members of the Communist Party of Germany (KPD) that existed from 1932 to 1933. They flew hammer and sickle over their headquarters too [2]. Many of the current members are commies also.
[1] https://en.wikipedia.org/wiki/The_Internationale
[2] https://upload.wikimedia.org/wikipedia/commons/2/2c/Bundesar...