"James Mason’s involvement with this country’s organized neo-Nazi movement dates back to the late 1960s. He joined George Lincoln Rockwell’s American Nazi Party as a teenager, where he first met Dr. William Pierce, author of The Turner Diaries. Years after Rockwell was assassinated by one of his supporters, Mason grew dismayed by efforts within neo-Nazism to build large political parties and organizations, and he began to advocate for an underground, terroristic approach to catalyzing white revolution.

From 1980 to 1986 he published his newsletter SIEGE, where began to extrapolate his increasingly radical ideas. Violent, dystopian and in full support of racial terrorism, SIEGE lionizes the most virulently racist minds of its day. In the newsletter, Mason insists that only the full collapse of American democracy and society will bring conditions sufficient to bring order through Nazism. Mason's praise for serial killer Charles Manson earned SIEGE much scorn in racist circles, and Mason was pushed to the movement’s margins by the late 1980s. Since 2015, members of the Iron March forum, hate groups connected to it such as Atomwaffen Division, and their fellow travelers have advocated that Mason’s dark, terroristic visions in SIEGE present the only way forward. Mason’s SIEGE is now more popular than ever within the racist right internationally."