... but I don't think it's fair to take it that far either.
Although they're not really a centrally-organized group, they're definitely out there. Loosely-organized, local groups. Nothing like the "Oath Keepers" or "Proud Boys" organizations that have an actual structured organization, but certainly not just an imaginary, non-existent, group.
if you don't like the source that is fine but he asked for a definition of antifa and I gave it in today's present form. They are violent (nobody will deny that), they attack people for no reason, and they try and shut down people from attending speeches by people they don't agree with. There is nothing anti about those fascist. Also, he is just an asshole that desperately tries to be funny but just isn't. Maybe his boy bun is wound too tight, his skinny jeans are cutting off circulation to his brain or he needs another soy latte.