Analysis of information sources in references of the Wikipedia article "Reductio ad Hitlerum" in English language version.
The Lubavitcher community itself, in the form of the 'Crown Heights Emergency Fund,' placed a full-page advertisement in The New York Times on September 20, 1991, under the heading 'This Year Kristallnacht Took Place on August 19th Right Here in Crown Heights.' Their version of Leo Strauss's reductio ad Hitlerum was rightly perceived by those who had been in Germany on Kristallnacht (November 9, 1938) as an outrageous comparison.