Antifa isn't the paramilitary arm of a dictator - in fact, their origins in the 1930s and now was to fight against such.
What you're referring to is is Trumpy's failed autocratic aspirations and the Unite the Right, Proud Boys, Boogaloos, MAGAs, QAnons, and various Far Right paint ball gun militias who, while not having the brains nor will to be organized any further than for thuggish brawls, are Don the Con's version of Brown Shirts.