Excellent article, CH.
Biblically, could we go back to Noah and Abram's forebears in Mesopotamia to account for these genetic links or are they more recent? Or is the distance of the genetic link not something that necessarily translates to a predictable timeline?
No one really knows why the Kurds are so close genetically to the Jews. Although Abraham came from what is today Kurdistan, Abraham was a semetic Aramean. The Kurds aren't Semeitc at all.
Similarly, although the Kurds live in the exact area where the Bible says the "Lost Tribes" were exiled, they have no tradition of being from Israel-- and no traditions resembling Judaism (unlike, for example, the Parthans of Afganistan).