My answer? Report, block and move on. Never reply or respond to their crap, don't give it airtime and if you want to alert authorities tag the FBI. They have whole divisions looking at these right wing terrorists. It will catch up with them.

People will always spread lies that cause violence, you can put fact checks on them, ban them or whatever but it won't change the harsh reality that a good percentage of the population wants to destroy the rest of us.

Tag law enforcement and let them keep an eye on it. That's what we pay them for.