In 2005 Ellen Levy-Coffman synthesised and assessed all the DNA evidence published so far, regarding the origins of the Jews, in her article "A MOSAIC OF PEOPLE: THE JEWISH STORY AND A REASSESSMENT OF THE DNA EVIDENCE" It is availabe online and makes very interesting reading. Here is a quote from her article: "But Jewish DNA presents a picture that is far more complex than just the Cohanim results. This picture is also far more diverse than what many genetic studies on Ashkenazi Jews would suggest. Instead, many of those studies have focused heavily on the Israelite DNA results, often downplaying the significant contribution of European and Khazarian ancestors. The examination of only a single component of Jewish ancestry has resulted in an incomplete and, to a certain extent, distorted presentation of the Jewish genetic picture. Diversity was present from Jewish beginnings, when various Semitic and Mediterranean peoples came together to form the Israelites of long ago. The genetic picture was clearly enriched during the Diaspora, when Jews spread far and wide across Europe, attracting converts and intermarrying over time with their European hosts. The most recent DNA evidence indicates that from this blending of Middle Eastern and European ancestors, the diverse DNA ancestry of the Ashkenazi Jews emerged." Eran Elhaik's research findings is clearly in line with this.
from the article: The Jewish people's ultimate treasure hunt