I agree, they will, but they are not the point. It is the their actual or potential allies and the rest of the world that are the audience in which I'm interested. 
In one respect I can agree with that, but in another respect I have to ask why we should even humor them. They know full well there was a Holocaust. I dunno, it just seems like there are more important things to do than to stop, take Iran by the hand, walk them through everything, and make the case in totality, only to have them blow it off and call it propaganda.
Can you honestly say that even if they are shown irrefutable facts and evidence they will not just claim it's all a scam by the West and the "eeeevil Joooos" created and enacted for their own purposes or some such other nonsense?
I agree, they will, but they are not the point. It is the their actual or potential allies and the rest of the world that are the audience in which I'm interested.