The class is required. But it’s been a good chance to discuss it with him. I just want to give him ammo.
There is no value in antagonizing the instructor. It won’t end well for your son.
Just have him regurgitate what ever is required, and move on. It’s your job to make sure he knows the truth.
The time to talk shit is when there is no risk to to your son....like next year after he’s already passed the class.