John McAdams, a Marquette University associate professor, says he is being "treated like a potential terrorist" after being suspended with pay and banned from campus while the university investigates his conduct, presumably because he publicly criticized a teaching assistant for not allowing discussion of gay marriage in an ethics class. A student had objected to the teaching assistant's handling of the class discussion weeks ago and, after class, recorded his conversation with her. The teaching assistant told the student that "some opinions are not appropriate, such as racist opinions, sexist opinions." She suggested if someone in the class were homosexual,...