An article in the Telegraph UK daily last week or so may have a clue why the head of Iranian state has a "thing" about Jews and Shoah. Article states that Mr. A actually was born into a family with a strongly Jewish surname (the Iranian equivalent of "Greenberg"). But the family changed this into a very Muslim moniker. According to some theories about the present chronic Jew-baiting by Mr. A, this may be a kind of posturing or compensation, to help sheild him from this potentially damaging skeleton in his family tree.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: Ahmadinejad, Netanyahu and the Holocaust: The ethics of memory