https://www.splcenter.org/hatewatch/2016/06/21/thomas-mair-brexit-and-us-uk-neo-nazi-connection
"Although illegal in Europe, inciting racial hatred is constitutionally protected speech and a lucrative cottage industry in the United States.
Notorious domestic terrorist groups like the Ku Klux Klan, with more than a century of bombings, lynchings and mayhem, are issued government permits to march down the streets of minority communities, usually with an armed police escort. Screaming and sputtering neo-Nazis, dressed in vintage WWII SS uniforms, have been similarly accommodated while they goosestep through Jewish neighborhoods. Parade permits are issued to hate group events even when law enforcement is fully aware of the high probability of violence.
In this country, hate groups have the legal right to express and incite racial hatred, call for the extermination of Jews, deny the Holocaust or harass and cyberstalk Jewish journalists on social media.
Technically, there is little the U.S. government or American society can do about homegrown hate. Unless these groups are directly linked to a violent crime they are free to propagate visceral hatred as a business model.
Even the most dangerous usually get a pass from federal law enforcement. These days, the FBI, for example, seems to consider the neo-Nazi National Alliance (NA) little more than a rapidly shrinking, “has-been” domestic extremist group plagued by infighting and incompetence since the death of the group’s founder, William Luther Pierce, 14 years ago.
Law enforcement and intelligence agencies overseas, however, are increasingly likely to view the ideology and influence of U.S. hate groups like the Alliance in a different context. Their propaganda is often illegal and their followers are increasingly violent. From Scotland Yard to Interpol, police are beginning to track the NA and monitor its supporters the same way they regard ISIS, Al-Qaeda or any other “violent non-state actor.”..."
(more)