yes, ofcourse he roots back to jewish. I do not know if he is really trying to hide his Jewish roots or he is just another Israeli in Iran, doing the same as them not in palestine but in Iran. Alot of big jewish families in Semnan have family names called Sabourjian. Another point is his new family name ahmadinezhad. Many of the Jewish who convert to Islam change their family to Ahmadi+something(Nezhad, Nia) or plain Ahmad or Mahmoudi, Mahmoud to connect themselves more and more to the Muslim's prophet Mohammad (peace be upon him). It is so clear.. I knew that from long time ago.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: Is Ahmadinejad trying to hide his Jewish roots by bashing Israel?