I'm sorry, but you're going to have to be specific. Saying "antifa" does not imply a singular group. The same way "KKK" does not imply a singular group.
>>0xy+(OP)
Trump tweeted: "The United States of America will be designating ANTIFA as a Terrorist Organization". This implies a singular group, a singular group which the consensus seems to be does not exist.
>>ben_w+W2
It does not imply a singular group. For example, Al-Qaeda is classified as a terrorist organization despite being made up of several structures and groups.
>>0xy+(OP)
If you'd checked the example you rely upon further down you'd have seen that in fact the individual Al-Qaeda groups are listed specifically in the State Department's listed of Foreign Terrorist Organizations. Now obviously I don't have the authority to say why that is, but it seems reasonable to presume that they are listed as separate organizations because they are, in fact, separate organizations.
>>rudiv+a6
Not necessarily. You don't want vague language in official documents, so you have to be specific, because you'd just shift the problem if you said "Al-Qaeda", since you now need an official list of Al-Qaeda-Subgroups.
If it would allow nesting, I'm pretty sure somebody would've already accidentally put Al-Qaeda under Ansar al-Sunna and cause a recursion error, blowing up DC.