“Antifa has…” is like saying “Nerds have” or “Hackers have”. It is really only a broad label, either assigned by one self or by others. I know people who are strictly against any violence and still proud to use Antifa “branding”. Others wouldn’t want to be called Antifa but are called that by others.
You are a HN user. Saying “HN users have enacted physical violence” and implying it is all of them is just utter bs.