The following is an excerpt.

Are Jews genetically homogenous? Though it’s certainly been a loaded question historically, the quandary has been the domain of scientists for a number of years now, all of whom have pretty much come up with the same answer: yes. But that was before Eran Elhaik entered the picture. An Israeli molecular geneticist, Elhaik is interested, it seems, not just in doing science, but in reveling in his role as a spoiler.

As a Jewish Daily Forward story recently described it, he has written a report that claims Ashkenazi Jews are descended from Khazars, a Turkic people from the Caucasus who converted to Judaism in the eighth century. This flies in the face of that established genetic research, which did prove a continuous genetic link between Ashkenazi Jews and the Middle East, positing that they descended from Jews who fled Palestine after the Muslim conquest in the seventh century.

Read the full story: Researchers Feud Over Jewish Genes