My interpretation The administration wants to label antifata as a foreign terrorist organization. This would add legal teeth to stop anti fascists. Any organization that this administration thinks is anti nazi or anti fascist could legally be shutdown if this goes through.
It’s just like “woke.” It’s anything they don’t like. Authoritarians don’t need reasons, they just need labels to stick on people.
As long as Trump and his gang are in power, there is no law. Act accordingly.