It's not a group. There are several smaller orgs that call themselves antifascist but there's no such centralized group or political structure. It's not even a specific ideology. It's just oppositional to fascism

So, its not a group, its just multiple groups with the same label. My point stands. You cant just believe what someone labels themselves as, nor what others label them as. I never called them a centralized group.

If you're opposed to one antifascist group you're just opposed to that group. But if you're opposed to all antifascism, then you're a fascist. The American government didn't just designate this group as terrorists, but additional designated all antifascism as terrorism.