What, the Guy Fawkes mask isn't enough? Do you need the list of US target anonymous attacked too? White supremacists, Bolsonaro, authoritarian agencies and governments? Their support of BLM or the arab springs? Their attacks on corporations like paypal?

Or simply, i was in an Antifa group from 2010-2013. Not in a street occupation group, but in a "search and confirm" group where we observed far right events and took notice of who went there, correlate that with police/military files (or politics). Social media watch too. The scandal about actual Nazis in the French army came from a parallel group from mine (i was in the west, the scandal is from a similar group in the east is think, i don't have that much info).

I was also an anonymous script kiddie between 2007-2010, anonymous pushed me towards local antifa groups. And this is one reason why i went into tech btw.

So your personal story confirms an unsurprising overlap.

Is everybodys story identical to yours?

Did one group actually spawn the other (given the timelines, loose structure, and global diffusion) or is it merely the case that some members in common moved from one group to other?

Arg, lost my dissertation...

Short answer : I don't really know. Antifa is way older than anonymous, but the intersection could have happened naturally, as both groups have the same "anarchist" ideology. That would mean that anarchism as a way to organize is somehow viable? Not sure.