So was the El Caeda
There is absolutely no comparison you can make between Al Qaeda and Antifa or Anonymous.
Believe people more.
If you knew Arabic, you would know that "Qaeda" as a word has strong insinuations of structure and hierarchy. It is in the name,
For most of people, it's no more than a product of their imagination.
You've believed that nonsense. People can lie, you know.
I know people that bumped into quite a lot of salafist organizations that would later affiliate with Al Qaeda, they were well organized and had funding as well as structure and hierarchy.
In any case, a few dozen angry disenfranchised seminary students with a leader as well as en executive council and multiple branches is more of an organization than Antifa is. I know that Al Qaeda has declined a lot, but I know for a fact that it was much more than what you claim it is at least at the time.
So I think they're gonna have a pretty hard time proving that anyone is part of "The Antifa Organization" just like it's impossible to prove that someone is part of "The Anonymous Organization". There is no hierarchy, no organized structure. The only way it could ever be applied would be to consider people with a given set of ideas and aesthetics terrorists.
Which would mean that there is a lot of overlap, as Anonymous is essentially based upon the idea of violent antifascism as far it's aesthetics and there is a ton of overlap between the dominant ideologies of Anonymous and Antifa (against state power, direct action, decentralized action, anti-censorship, violence against those you believe are a threat including organic censorship, etc...)
In any case, it's very bad for everyone.