Harris' piece includes this:
Islamic fanaticism has a historical depth in Muslim culture; it was present at the creation of these cultures, and that makes it radically distinct from the threats posed in the last century by Italian fascism, Nazism, or Soviet Communism, all of which, by their own claims, represented a new departure, a revolutionary transformation of both society and culture. The European threats demanded new prophets with a new revelation—men like Mussolini, Hitler, and Lenin; but Islamic fanaticism appeals to the same prophet and the same revelation that has held together the community of the faithful for nearly fourteen centuries. It is not an innovation, but a restoration. It is consciously seen by those who espouse it as a return to tradition, and not a bold leap into the future. Thus the threat of radical Islam is not a flimsy structure, destined to be blown away in the near future; it taps into the bedrock of Muslim culture, and has the capacity for strengthening itself immensely by spreading throughout the general public that distinguishes it from Italian fascism, Nazism, or Communism.