The pic of the black-clad antifa dude shows him carrying a blatant ripoff of the 4th (Third Reich/Nazi) variant Reichskriegsflagge.
The circular Antifa "Antifaschistische Aktion" logo is a clear ripoff of not a Nazi logo, but the Communist "German Socialist" logo of the - IIRC - 1930's.
Both groups were socialists. Both brought havoc to the Weimar Republic. Q has said that their symbols give them away.
Whether Communist, National Socialists, or Antifa the all like red.