The Seton Hall University student group known as The Concerned 44 is demanding the resignation or the firing of a history professor for “controversial” comments he made on his personal website.

Professor Williamjames Hoffer had compared The Concerned 44 to the KKK, writing “As usual, replace ‘black and brown’ with white and vice versa, and you cannot tell the difference between the Concerned 44 and the Ku Klux Klan.”

In addition, in a year-old Facebook post Hoffer had called the Southern Poverty Law Center a “hate group,” and claimed that Black Lives Matter and radical Muslim terrorists are a bigger threat than the KKK and Neo-Nazis, The Setonian reports.