Rothbard's endorsing of World War II revisionism and his association with Barnes and other Holocaust deniers have drawn criticism. Kevin D. Williamson wrote an opinion piece published by "National Review" which condemned Rothbard for "making common cause with the 'revisionist' historians of the Third Reich", a term he used to describe American Holocaust deniers associated with Rothbard, such as James J. Martin of the Institute for Historical Review. The piece also characterized "Rothbard and his faction" as being "culpably indulgent" of Holocaust denial, the view which "specifically denies that the Holocaust actually happened or holds that it was in some way exaggerated".