It is no different than the idea of "globalists." It is an idea and not an organization. The government would find it easy to attack an organization as a domestic terrorist group, but, alas the only thing concrete about Antifa are the people showing up for a cause, not a meeting.
I guess everyone unable to come to terms with real pain for real reasons will need the idea of a scapegoat.
June 1, 2020
By Nicholas Bogel-Burroughs and Sandra E. Garcia
Seeking to assign blame for the protests (click here) that have convulsed cities across the country this week, President Trump said on Sunday that the United States would designate antifa, the loosely affiliated group of far-left anti-fascism activists, a terrorist organization.
The president’s critics noted, however, that the United States does not have a domestic terrorism law and that antifa, a contraction of the phrase “anti-fascist,” is not an organization with a leader, a defined structure or membership roles.
Rather, antifa is more of a movement of activists whose followers share a philosophy and tactics. They have made their presence known at protests around the country in recent years, including the “Unite the Right” rally in Charlottesville, Va., in 2017....