Iran’s leadership denies and mocks the holocaust and the millions who suffered and died
…and I will bless them that bless thee, and him that curseth thee will I curse: and in thee shall all the families of the earth be blessed.
Genesis 12.3
In the Hebrew, the word for him that “curseth” is kawlal, which is to treat with contempt, or to bring contempt or dishonor on. God will "curse" those who treat Israel with contempt, with a stronger curse aw-rar', to curse completely, lay under a curse, to destroy.
Ahmadinejad and all of Iran may deny and dismiss the Jews, Israel and the holocaust all they like, but God will not dismiss them, or anyone else who curses what He has forbidden to be cursed.
http://www.breitbart.com/news/2006/11/28/061128112022.jb4p2s13.html