Anyone is antifa

The US equivalent would be Trump freezing bank accounts of US citizens who donated to the BLM riot movement.

I am pleased to inform our many U.S.A. Patriots that I am designating ANTIFA, A SICK, DANGEROUS, RADICAL LEFT DISASTER, AS A MAJOR TERRORIST ORGANIZATION,” Trump wrote. “I will also be strongly recommending that those funding ANTIFA be thoroughly investigated in accordance with the highest legal standards and practices. Thank you for your attention to this matter!”

And here we have it. There is no “organization” known as antifa. So the US government will be able to just label anyone they dislike as being antifa. Watch out Jimmy Kimmel.