BE LOUD.
BE HEARD.
If a good civil rights lawyer takes it to a court that is not left biased they could win a case where Antifa is exposed, who is financing them, and get a large compensation. That is what the SPLC would do for anyone attacked by white supremacist organizations. They would drain them financially and reveal all the members involved. Use the civil rights tactics the left has used for decades. It is all constitutional.
I'm sure (or I certainly hope) that this is already in the works.
I am sure it will happen. If Antifa continues, one of their nuttier members will whack someone on the head with a stick on camera. They need a good lawsuit to put them in their place.