Any idea can be brought into the classroom if the point is to inquire into its structure, history, influence and so forth. But no idea belongs in the classroom if the point of introducing it is to recruit your students for the political agenda it may be thought to imply.
“I don't shoot guns. I don't know how to do that. I grew Upstate New York, so I fought with my fists.”
“You know what they call the fellow who finishes last in his medical school graduating class? They call him 'Doctor.'”