I fully disagree with Stenger's assessment that Ahmadinajad is ignorant of the particulars of the Holocaust and therefore denies its historicity. He knows full well that it had occured and uses denial to get back at the Israelis for their denial of the Nakba and their complicity in perpetrating it. It is petty, and callous because two wrongs do not make it right. Equally callous is Natanyahu's exploitation of the Holocaust in support of his rejectionist attitude towards the Palestinians. Norman Fikelstein castigated the 'Holocaust industry' in a scathing and well documented book. It is this industry, in the service of Israel's deplorable policies and behaviour towards vanquished people that supplies the excuse for the mindless, malicious and unsustainable denial of the Holocaust.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Ahmadinejad, Netanyahu and the Holocaust: The ethics of memory