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White Supremacists doing the "roman salute" in order to antagonize the protesters in Shelbyville, Tennessee, Illinois, US on 28 Ocotber 2017. (Photo by Shay Horse/NurPhoto via Getty Images)

White Supremacists doing the "roman salute" in order to antagonize the protesters in Shelbyville, Tennessee, Illinois, US on 28 Ocotber 2017.  (Photo by Shay Horse/NurPhoto via Getty Images)

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VALLEY FORGE, PA - SEPTEMBER 25: An American Nazi party member salutes during American Nazi Party rally at Valley Forge National Park September 25, 2004 in Valley Forge, Pennsylvania. Hundreds of American Nazis from around the country were expected to attend. (Photo by William Thomas Cain/Getty Images)

VALLEY FORGE, PA - SEPTEMBER 25: An American Nazi party member salutes during American Nazi Party rally at Valley Forge National Park September 25, 2004 in Valley Forge, Pennsylvania. Hundreds of American Nazis from around the country were expected to attend.  (Photo by William Thomas Cain/Getty Images)

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MOSCOW, RUSSIA - NOVEMBER 4: Demonstrators give the Nazi salute, as they carry a styled swastika flag, during a march called by several ultranationalist organizations, marking the new People's Unity Day holiday on November 4, 2005 in Moscow, Russia. (Photo by Oleg Nikishin/Pressphotos/Getty Images)

MOSCOW, RUSSIA - NOVEMBER 4:  Demonstrators give the Nazi salute, as they carry a styled swastika flag, during a march called by several ultranationalist organizations, marking the new People's Unity Day holiday on November 4, 2005 in Moscow, Russia.  (Photo by Oleg Nikishin/Pressphotos/Getty Images)

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Facist demonstrators show the nazi salute as the clash with Anti Facist demonstrators marching through Dover at a counter demonstration also taking place in the port town. 30th January 2016 (Photo by In Pictures Ltd./Corbis via Getty Images)

Facist demonstrators show the nazi salute as the clash with Anti Facist demonstrators marching through Dover at a counter demonstration also taking place in the port town. 30th January 2016 (Photo by In Pictures Ltd./Corbis via Getty Images)

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BARCELONA, SPAIN - OCTOBER 12: A Spanish far right member does a Nazi salute as he demonstrates against the independence of Catalonia during the Spain's National Day on October 12, 2013 in Barcelona, Spain. Hundreds of far right protesters arrived from different cities across Spain to hold a demonstration against the independence of Catalonia. (Photo by David Ramos/Getty Images)

BARCELONA, SPAIN - OCTOBER 12:  A Spanish far right member does a Nazi salute as he demonstrates against the independence of Catalonia during the Spain's National Day on October 12, 2013 in Barcelona, Spain. Hundreds of far right protesters arrived from different cities across Spain to hold a demonstration against the independence of Catalonia.  (Photo by David Ramos/Getty Images)