They commit genocidal murder against people on the basis of DNA and cultural background?
You don't have to hate a certain race to be fascist. It's just putting your nation above all others (even at the other countries detriment), while also being violently authoritative to your opposition and people. Taking control of business, banks, and religion. Antifa may not be about putting America above all other countries, but they sure as hell check off all the other qualifications.