This is a very good article that really gets you thinking.
I would have to say that Holocaust deniers should be heard, and measured based on their arguments. To shut these people out before their case is heard is (to me) completely irrational. I might not like such people, but if these people can present a rational argument that challenges my view of events, then I've gained something. Either my view holds up on the basis of rational debate and my view is reinforced, or I'm forced to question it by a greater logic. To remove the voice of holocaust deniers is to remove that opportunity.
The essay question seems to be mainly about teaching. Things that are taught have usually been through some sort of evaluation process. This evaluation process is the right place for the voices of deniers’. If they manage to make a convincing argument their views should certainly be presented to classes.
One of the things I would probably emphasize if I were writing such a essay is that there should be no automatic process of exclusion but also no automatic process of inclusion. Evidence matters and if deniers don’t have it their views and voices have no place in classes.
I would have to say that Holocaust deniers should be heard, and measured based on their arguments. To shut these people out before their case is heard is (to me) completely irrational. I might not like such people, but if these people can present a rational argument that challenges my view of events, then I've gained something. Either my view holds up on the basis of rational debate and my view is reinforced, or I'm forced to question it by a greater logic. To remove the voice of holocaust deniers is to remove that opportunity.