Second, the article is not clear whether the ACLU will sue to get rid of the professor or sue on his behalf.
Though this may surprise you, the ACLU is suing on his behalf. In MOST instances, the ALCU is defending the Constitution, specifically free speech, not liberalism.
Hoppe, along with the American Civil Liberties Union of Nevada, contend that it is ridiculous for the university to try to punish him for expressing his rights for freedom of speech as well as academic freedom. The ACLU, on Hoppe's behalf, also stated that although they would rather it not come to it, they are willing to sue UNLV for its violation of Hoppe's civil rights.
UNLV--University of Nevada-Las Vegas
It's best known as a powerhouse in college basketball (third winningest Division I college team).