A Carnegie Mellon University professor is on a voluntary sabbatical while school officials review what they called “hostile and threatening social media posts.” Uju Anya, an associate professor of second language acquisition, is under scrutiny following a 2021 exchange on X in which she is alleged to have posted, “Die first, white man,” in a thread between herself and a user with the handle @TheWuhanClan. That user shared screenshots of the five-year-old exchanged on Friday. Carnegie Mellon posted to X on Friday, saying, “Dr. Uju Anya is currently on voluntary professional leave from the university and is not teaching courses...