It's definitely a mistranslation, and it suits their purposes of trying to drum up support for an attack on Iran. Here is the correct translation...


"He made an analogy to Khomeini's determination and success in getting rid of the Shah's government, which Khomeini had said "must go" (az bain bayad berad). Then Ahmadinejad defined Zionism not as an Arabi-Israeli national struggle but as a Western plot to divide the world of Islam with Israel as the pivot of this plan.

The phrase he then used as I read it is "The Imam said that this regime occupying Jerusalem (een rezhim-e ishghalgar-e qods) must [vanish from] from the page of time (bayad az safheh-ye ruzgar mahv shavad)."

Ahmadinejad was not making a threat, he was quoting a saying of Khomeini and urging that pro-Palestinian activists in Iran not give up hope-- that the occupation of Jerusalem was no more a continued inevitability than had been the hegemony of the Shah's government.

Whatever this quotation from a decades-old speech of Khomeini may have meant, Ahmadinejad did not say that "Israel must be wiped off the map" with the implication that phrase has of Nazi-style extermination of a people. He said that the occupation regime over Jerusalem must be erased from the page of time."

http://www.juancole.com/2006/05/hitchens-hacker-and-hitchens.html