Find me a source that states that the Iranian people and govt. don't believe the holocaust happened.
And BTW, investigating into matters involving the holocaust, doesn't necessarily imply denying it.
Amahdinejad, December 2005: "They have fabricated a legend
under the name of The Massacre of the Jews.''
Iran's puppet Hamas, Stockholm 2000: "The Holocaust is an alleged and invented story.''
Syrian author Al-Mardani on Iranian TV: "I was very happy when the Iranian President denied the Holocaust.
No, investigating matters involving
the Holocaust does not necessarily imply denying it, but investigating the existence
of the Holocaust confirms lunacy.