I tend to view these "Lost Tribe" seed migrations with the same goggles I use to look at how the Vikings and Christopher Columbus "discovered" the New World when 90 million people were living there already.
Even if a tribe of Israel were to leave the area and travel to the Caucuses, or to Northern Europe or Western Europe, they are not arriving in unclaimed territory.
Not to mention that genetic drift between groups has been going on for so long that the idea of race is little more than collective wishful thinking.
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