I read the link and its so painfully obvious that this "conference" is not one of discussing the true holocaust but to rewrite their version of "truth" to justify their desire to to further foment hate and the destruction Isreal. Its a sham.
The idea that tells me this is a attempt to rewrite history to an Iranian revision is to see who is wanting this conference and then to consider the source (and the past of this sourse). Rewrite a different version of what they want the muslim world to see is their "truth". present it on their tv and newspapers to the masses and then rally support from same via the clerics who will preach this new "truth" for destruction of Isreal and anyone else not liked by them. To me it is clear as day.
Iran has decided to rewrite and revise the history of the Holocaust. Following the repeated declarations by the Iranian president, Mahmoud Ahmadinejad, and other senior government officials on the need to re-examine the history of the genocide of the Jews during the Second World War, the association of Islamic Journalists of Iran has been tasked with quickly putting together an international conference on the Holocaust. .........
"We want to offer a free and democratic platform to the historians to examine in-depth this myth, seeing that in different European countries there exist laws against democracy and freedom that to do not allow intellectuals who believe in a version distinct from that which is officially pronounced on the Holocaust," added Afzali.
excerpts from the article. the 2 excerpts sais it all as to the purpose - its not to find truth but to rewrite history for their political proganda.
but of course, this is only my opinion.