I invite the reader to a thought experiment. Imagine that it is the late 1930s, and "conservative" intellectuals in Western Europe and the United States formulate an ideology which says that their countries should be open without discrimination to all people of all political persuasions. Then imagine that large numbers of immigrants of all political persuasions begin entering and settling in those countries, including many Nazi immigrants from Germany and Austria. Then imagine that the Nazi immigrants, following the Nazi ideology as laid out in Hitler's Mein Kampf, begin promoting the spread and institutionalization Nazism in their new countries, while...