I realize German antifa has communist origins. But that group has no organizational connection to the current American antifa movement, which didn't begin until 2016 when Trump was elected.
The precursor to American Antifa is the Anti-racist Action groups of the 80s (see link).
Modern Antifa (which is not an official organization) is anti-racist and anti-Nazi. That's what they believe. They may have borrowed the name from the pre-WW2 German antifa, but that's about all they have in common (other than both groups violently oppose Nazis).
Link: Antifa (United States)
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