Wait, there’s more:
“Modern DNA studies on the Y chromosome of Jews worldwide have largely disproven the Khazar origin theory for the majority of Ashkenazi.
A 1999 study by Hammer et al., published in the Proceedings of the United States National Academy of Sciences compared the Y chromosomes of Ashkenazi, Roman, North African, Kurdish, Near Eastern, Yemenite, and Ethiopian Jews with non-Jewish groups from similar geographic locations. It found that “Despite their long-term residence in different countries and isolation from one another, most Jewish populations were not significantly different from one another at the genetic level... The results support the hypothesis that the paternal gene pools of Jewish communities from Europe, North Africa, and the Middle East descended from a common Middle Eastern ancestral population, and suggest that most Jewish communities have remained relatively isolated from neighboring non-Jewish communities during and after the Diaspora.”[46] According to Nicholas Wade “The results accord with Jewish history and tradition and refute theories like those holding that Jewish communities consist mostly of converts from other faiths, or that they are descended from the Khazars, a medieval Turkish tribe that adopted Judaism.”
Thank you for your answers, I am going to be reading the links you posted.