it's nothing personal

Mr. Smith, you are one of my favorite teachers of all time. I am more than glad that I took your world history class last year and spent a good deal of time hating it superficially. Now, that I am in Holocaust, and you feel that the brotherhood you and your students have has evolved enough for free usage of the f-bomb, I have no regrets of joining you for another go-around. However, this does not mean that I agree with everything you say. Now, I know you re-evalute your teaching methods a great deal (since you have asked me about your preachiness and what I thought of the class), and because of this fact my gripe is rather limited, but sometimes I just feel like you are oblivious to what you are doing.
Exhibit A: You will not allow yourself to admit that while you are correct in saying that stereotypes do not represent a fair amount of the population, they do do justice to some.
Exhibit B: You preach of open-mindedness but won't accept anything but what you believe to be true as answers from us. (Thank God you don't teach English.)
Exhibit C: You won't just say what we are all thinking. I mean come on, old people drive slow.

That being said, thanks for a great class so far...