The DHS 'lexicon'

Another document prepared by the Department of Homeland Security is making waves: the "Domestic Extremism Lexicon." In some 12 pages, it defines terms like 'alternative media,' 'Jewish extremism,' and 'radicalization' but, according to its preface, does not address Muslim extremism. I assume a companion piece defines the terms of art connected to that threat, but so far no information about it.