It's wonderful that science is proving a physical link to ancient Israel. However, DNA does not determine your right to BELONG to any nation. No one can claim to be Jewish unless they observe the laws of the TORAH. To become a member of any nation, for example, America, one must swear allegiance, uphold and keep the laws of the U.S. Constitution. The nation of Israel is the only NATION ever established by the Creator. He charged them, as a nation to swear allegiance, observe and keep the laws of their constitution known as the TORAH. G-d did not tell Avraham Avinu, "I will make you a great religion" Being a Jew means BEING a Jew. Modern Israel will only be that nation when ALL of its citizens fully embrace Torah and recognize it as their charter from the Creator to be called Israel. May it come speedily in our time.
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from the article: Report: DNA tests support Zimbabwe tribe's claim of Jewish roots