Were Ashkenazi Jews Really Khazars? Busting History's Ugliest Myth

Welcome to When One Heart Became Two Worlds: Lesson V — The Birth of Ashkenazic Jewry

Are Ashkenazi Jews really descendants of the Khazars, with no biological or historical tie to the Land of Israel? That claim is spreading again today — and it’s wrong. Here’s the evidence.

In this fifth installment of our Sephardic and Ashkenazic Jewry series, Rabbi Greenberg traces the word “Ashkenaz” back to the Book of Genesis, follows the Talmud’s identification of Ashkenaz with Germania, and then systematically dismantles the modern theory — popular with antisemites and anti-Israel activists — that Ashkenazi Jews descend from the Khazar kingdom rather than from Abraham, Isaac, and Jacob. Using linguistic evidence (Yiddish has zero trace of the Turkic languages the Khazars spoke), documented historical migration (German Jews moved steadily eastward into Poland and Russia), and modern genetic research, the theory is shown to have no real support.

From there, the class turns to how Ashkenazic Jewry actually took shape: Charlemagne’s Carolingian Empire welcoming Jewish traders, the rise of Jewish communal life along the Rhine, and the sharp cultural split between Sephardic Jews — steeped in the philosophy, medicine, and science of the Islamic world — and Ashkenazic Jews, whose only intellectual outlet under Christian Europe was Torah and Talmud itself. That difference explains why Maimonides was a philosopher-physician and Rashi was purely a Talmudist.

The heart of the class is Rabbeinu Gershom Me’or HaGolah (“Light of the Exile”), born around 960 in Metz, France — the first towering authority of Ashkenazic Jewry and, alongside Rabbeinu Chananel in Sepharad, author of one of the earliest running commentaries on the Talmud. His famous cherem (bans) reshaped Jewish life: forbidding polygamy, forbidding a husband from divorcing his wife without her consent, mandating that Jews forced into Christianity be welcomed back without any need for reconversion, banning the reading of other people’s private mail, and more. The class closes with the personal tragedy behind these rulings — his own son’s forced conversion — and why he alone, among all of Jewish history’s sages, carries the title “Light of the Exile.”

🔎 In this video we explore:

• Where the word “Ashkenaz” actually comes from — and why Rashi already used it 1,000 years ago
• The Khazar theory, debunked with linguistic, historical, and genetic evidence
• Why Charlemagne’s empire became a turning point for Jewish life in Europe
• Why Sephardic Jews produced philosophers and Ashkenazic Jews produced Talmudists
• The truth about medieval Jewish money lending — and why the stereotype is wrong
• Rabbeinu Gershom’s five enactments, including the ban on polygamy Sephardic Jews never accepted
• The medieval legend of a kidnapped Jewish child who may have become Pope

⏱️ TIMESTAMPS

📚 Sources discussed: Genesis (Ashkenaz, son of Gomer), Talmud (Gomer identified with Germania), Rashi, Rav Sherira Gaon, Rav Hai Gaon, Rabbeinu Chananel, Rabbeinu Kalonymus, Rabbeinu Yehuda Leontin (Sir Leon), Rabbi Shimon ben Yitzchak, Rabbeinu Gershom Me’or HaGolah and his takanot