This article is concerned with a specific type of hate speech: Holocaust denial. It is concerned with the expression of this idea by educators. Should we allow Holocaust deniers to teach in schools? This article attempts to answer this question through a close look at the Canadian experience. First, I will establish that Holocaust denial is a form of hate speech. Next, I will lay down the main premises of the argument and make some constructive distinctions that will guide our treatment of teachers who are Holocaust deniers. Finally, I will probe three cases--James Keegstra, Malcolm Ross, and Paul Fromm--and argue that hatemongers cannot assume the role of educators. (Contains 28 notes.)