As soon as someone claimed to have evidence that Mahmoud Ahmadinejad had Jewish ancestors (Berman Post: Mahmoud Ahmadinejad Had Jewish Ancestors?), you knew the counter argument would be around the corner.
So is he, is he not; does it matter? You have to figure out the first part of that question, but I will help you out with the second part. No, it does not matter. He still seems bent on getting a nuke to commit a second Holocaust, or if you ask him, the first. A person with Jewish ancestry dropping a nuke on Israel will kill just as many as a person without Jewish ancestry, and Israel will do everything in its power to prevent either of those scenarios from coming to pass.
"The claim is based on a number of arguments, a key one being that his previous surname was Sabourjian which "derives from weaver of the sabour, the name for the Jewish tallit shawl in Persia".
Professor David Yeroshalmi, author of The Jews of Iran in the 19th century and an expert on Iranian Jewish communities, disputes the validity of this argument. "There is no such meaning for the word 'sabour' in any of the Persian Jewish dialects, nor does it mean Jewish prayer shawl in Persian. Also, the name Sabourjian is not a well-known Jewish name," he stated in a recent interview. In fact, Iranian Jews use the Hebrew word "tzitzit" to describe the Jewish prayer shawl. Yeroshalmi, a scholar at Tel Aviv University's Center for Iranian Studies, also went on to dispute the article's findings that the "-jian" ending to the name specifically showed the family had been practising Jews. "This ending is in no way sufficient to judge whether someone has a Jewish background. Many Muslim surnames have the same ending," he stated."