What can we do to stop these jerks?

If they actually initiate violence, take appropriate action in the criminal and/or civil courts. If they just blather, live with it. Freedom of expression that is limited to nice people isn't freedom of expression at all. It used to be just the conservatives that didn't understand that point. Now the liberals don't either. Those of us in the radical middle are the only ones left who give a damn about freedom in this country.

Peter.