The use of anti-klan laws against leftist agitators and criminals has been used by several states since 2010. South Carolina used its anti-Klan laws against a big chief in BLM. Obama sent him down to organize riots, an action that is specifically adressed under the anti-klan legislation.
He got 5 to 10 years in state prison. Jesse Jackson had a fit that anti-klan laws were used against a black agitator, but BLM and the fascist antifa have avoided organizing in the state since that conviction. The next step will be using the anti-klan laws against paid federal agitators.