No mass is 100% identical though, so "you can't use some individual actions to project on the group they chose to be part of and that chooses to accept them" really just makes the concept of groups useless.
"No, that specific action wasn't covered by our shared intent, so obviously we will accept responsibility for it" is something I believe pretty much everybody will agree on after the action has happened and has resulted in negative feedback. Had it produced applause and achieved the goal of the group, they would have celebrated it.
You certainly can't cherry pick them (one instance of violence versus billions of instances of peacefulness, for example), apart from "group that chooses to accept them" not applying here.
> Had it produced applause and achieved the goal of the group, they would have celebrated it.
Had there been anye instances of violence by people calling themselves antifa, those seeking to defend the ongoing, systematic violence would have invented instances of violence of people they call antifa. See how that works, or rather, how it doesn't?
> See how that works, or rather, how it doesn't?
My point is that disowning a member's actions when they aren't considered favorably post factum is what pretty much every group does. If Antifa/black bloc were actively promoting non-violence, that would be a different issue, but this rather sounds like the Daily Stormer saying "we don't condone violence wink wink" when another one of their goons snaps and shoots up a mosque.
If the black bloc was all of antifa, it would just be called antifa. Outside the black bloc, direct action covers a lot of things, from just organizing all sorts of things (not just protests), art and being loud, to vandalism and even violence.
Just take all the sorts of things that were done in human history while claiming it was for freedom, both bad and good. Does that make any person doing thing X in the name of freedom responsible for what a person doing Y in the name of freedom? You can call those people a "group" all day long, but that doesn't mean they're actually a group in the sense of voting on their values and actions.