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Thanks for asking! For a start, you can call the numbers I put out, or contact these guys' employers through their social media. Once these guys start to feel some consequences, they usually stop organizing. (1/2)
And if you want to start monitoring far-right organizing in your area, check out Spencer Sunshine's "40 Ways to Fight Nazis." It's a great beginner's guide to combating fascist organizing at home. http://www.showingupforracialjustice.org/disrupting-white-nationalists.html …
And if you ever want to talk through the how-to's of how we do this stuff-- monitoring the far-right, gathering intelligence on them, infiltrating their organizations, and then building community campaigns to shut them down without involving the police-- please DM me. 
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