There's a big fuss over liberal professors--even a bill to outlaw unpopular points of view. Throughout the recent debates, I haven't heard Arthur Butz mentioned.
With no training in history, Butz wrote The Hoax of the Century, one of the first and most influential books denying the Holocaust, yet kept his position as professor of engineering at Northwestern University. (Amazon.com gives it three stars.) Recently (the article I found is from 1997), he used the university's server to publish revisionist web pages. Again, despite criticism, he gets off scot-free.
You'd think that a network claiming to be fair and balanced would at least mention Butz. It took me about three seconds on a google search to dig up the dope on him. They've got to have at least an intern who can type.