The problem is that many interpretations of Islam (aiui) strictly forbid showing depictions of Muhammad. So I think the argument would be he's trying to force M

The problem is that many interpretations of Islam (aiui) strictly forbid showing depictions of Muhammad. So I think the argument would be he's trying to force Muslims out of his class, or some such. (To be clear, I still think an art history professor should be able to show whatever artwork they want.)