CLEMSON, S.C. (WSPA) -- A former professor is suing Clemson University over its decision to fire him for a social media post criticizing late conservative pundit Charlie Kirk.

The American Civil Liberties Union of South Carolina filed a complaint on behalf of Joshua Bregy. It claims Bregy's First Amendment rights were violated.

“The First Amendment protects the rights of public employees to speak in their personal capacity on important public topics,” said Allen Chaney, legal director for the American Civil Liberties Union of South Carolina. “When it comes to free speech, Clemson isn’t allowed to cave to the whims of a political mob. Fortunately for us all, the Constitution is made of sterner stuff than that.”

Bregy worked as assistant professor in Clemson’s Department of Environmental

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