It's kinda unprofessional tbh. Just teach the stuff and try to enlighten the less educated with facts. It's up to them to decide whether to remain ignorant.

In Iran evolution is not taught in schools but creationism is. I heard from my friend that even in some universities it's not taught. The regime wants the students to be ignorant about evolution. Suppose an Iranian student attends this professor's class for the first time and suppose she/he hasn't read much about evolution. I think it's better to avoid making such slights in a class where you might have students from different backgrounds. Try to present them with facts on topics that they're poorly educated instead of making slights. Leave the slights to the Internet.