Paul Johnson in Commentary:
The intensification of anti-Semitism in the Arab world over the last years and its reappearance in parts of Europe have occasioned a number of thoughtful reflections on the nature and consequences of this phenomenon, but also some misleading analyses based on doubtful premises. It is widely assumed, for example, that anti-Semitism is a form of racism or ethnic xenophobia. This is a legacy of the post-World War II period, when revelations about the horrifying scope of Hitler’s “final solution” caused widespread revulsion against all manifestations of group hatred. Since then, racism, in whatever guise it appears, has been identified as the evil to be fought.
But if anti-Semitism is a variety of racism, it is a most peculiar variety, with many unique characteristics. In my view as a historian, it is so peculiar that it deserves to be placed in a quite different category. I would call it an intellectual disease, a disease of the mind, extremely infectious and massively destructive. It is a disease to which both human individuals and entire human societies are prone.