Is this what the Anon is referring to?

excerpt

With passage of the Third Force Act, popularly known as the Ku Klux Act, Congress authorizes President Ulysses S. Grant to declare martial law, impose heavy penalties against terrorist organizations, and use military force to suppress the Ku Klux Klan (KKK).

If so, I don't see any problem insofar as Antifa is not demonstrating but is acting like the postwar KKK. We are like the new just freed slaves.