Ah, yes! And how many students will mimick his politics in order to get on his good side and pass his course? Lets face it, their are alot of sheep in this world, and many will merely "go-along" in order to survive. Not everyone, especially students, that have not found their "way" in life as yet will contradict authority figures because of fear of failure.
Professors and teachers are in a unique situation where they have the ability to mold minds. I prefer their personal opinions not get in the way of developing young minds who otherwise would develope themselves.
I hear you.