In my opinion it would be a movement if facism was the status quo. Given most people are discussing Western nations, which while adopting facism at an alarming pace; are not yet facist. Antifa is not a movement nor an organization. Since not being facist is the status quo and antifa means that you're not going to support facism, in my opinion antifa is the current "establishment" and being facist is an effort to move the status quo. Aka a movement.