"Given that the university’s actions seem to be based just on [Professor John] McAdams’s criticism of another instructor (though I’d love to hear more from readers who know any further facts on all this) those actions strikes me as quite improper. Marquette is a private university, and thus not bound by the First Amendment; and Wisconsin is not one of the states that generally restricts private employer retaliation based on an employee’s speech. Still, Marquette frames itself as a university that respects academic freedom and free speech rights. Acting this way towards a faculty member who publicly expresses his opinions on an important issue, including when the issue involves what he sees as improper suppression of student views by a colleague, stifles that freedom."(For background, see Matt's earlier post.)
'Marquette seems to be behaving quite badly here'
Eugene Volokh weighs in at The Volokh Conspiracy blog in The Washington Post.