I think all of you will have heard this by now. Neo nazis are particularly stubborn and constantly reccomend the documentary. Is there a certain video or piece debunking this crap. Yes I'm aware the creator is not a historian or even a documentary maker but these arguments need more teeth.
For a debunking of specific points, see the excellent website holocaustcontroversies here. For a more general debunking of Holocaust Denial and their methods see the Monday Methods post I've written.