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.
“A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between proofs and the best mathematician can notice analogies between theories.”
“You know that I am living proof that the American Dream is real. Growing up, our congressman cut through government bureaucratic red tape to help my mom buy our first house. That's the kind of congressman I'll be.”