[QUOTE=Cool Matty]To expect a teacher to be completely unbiased on politics is not only stupid, but unrealistic. Even if the teacher tries to be unbiased, there will be bias in what and how he teaches.
I liked how my senior year teacher taught class. He started the first day by saying he would attempt to be unbiased, but that he did favor Bush, and that all students should keep that in mind during the class, so that if he ever did go biased, the students would at least be able to recognize it as such.[/QUOTE]There's a difference between trying to be neutral by presenting fact and deliberately going against this principle by filling lectures with subjective rubbish.
I will concede that yes, it is unlikely a teacher will be able to reign in all of his opinionated rhetoric. However, teachers should express their bias by what facts they emphasize, not extraordinary claims without proof. Or they could even present the opinions of OTHER people. There are many easy ways to retain a neutral lecture.
Anyway, this is all assuming the teacher actually believes Bush is as bad as Hitler--unlikely. More likely, he is using hyperbole as a means to demonize someone he doesn't agree with. The use of bias all together aside, this particular sort of argumentation should be kept on talk radio and the internet, not classrooms.