Arthur Butz

Dr. Arthur Butz is a tenured engineering professor at Northwestern University and a well-known Holocaust denier.  He wrote a book called "The Hoax of the Twentieth Century" where he claims the Holocaust is a hoax. The book claims, "not only that they [the Jews] were not virtually wiped out, but what's more, that no evidence exists to date to confirm that there was ever any Hitler attempt to do so". Northwestern University formulated a policy specifically for Dr. Butz which requires the university to offer duplicate options of all his courses so that no student has to take his course in order to graduate. He also publicly supported then-Iranian President Mahmoud Ahmadinejad for calling the Holocaust a myth. 
 
Source(s):  http://articles.chicagotribune.com/2006-02-04/news/0602040129_1_engineering-professor-arthur-butz-iranian-president-mahmoud-ahmadinejad-mehr-news-agency, https://www.amazon.com/Hoax-Twentieth-Century-R-Butz/dp/0967985692, https://www.insidehighered.com/news/2006/02/08/butz