"Antifa" is simply a label for people who oppose fascism, as we all should, of course. There's no "organization" called Antifa, and there's no such thing as an "Antifa leadership", let alone any coherently linked group of people on the Left capable of impersonating right-wing extremists OR forcingaits way past the Capitol Police & creating the terrifying chaos we saw on January 6th.
Trust me on this- if any actual "Antifa" types tried to pull of something like that, they'd spend the first two hours sharing pronouns and vegan snacks.