[GovernmentShrinker]

I'm not an expert on this esoteric area of history, but there is quite a lot of scholarship on it that has nothing to do with "Holocaust deniers". Of course Holocaust deniers will latch onto any scrap of real or fabricated information to support their bizarre story. To a rational person, the Khazar issue doesn't have a lot of bearing on the need for a Jewish homeland -- the Nazis didn't show any interest in who was or wasn't descended from the Khazars when they herded everyone they regarded as a Jew into the death camps (nor have any other purveyors of blatant anti-Semitism made any distinction -- they can't have it both ways: hating people because they're Jews, while simultaneously claiming they actually aren't Jews). The history of persecution and slaughter of Jews is the main bond that the Khazar-descended Jews (however many there really are) have with the Jewish people, and it is not an insignificant bond.

[malakhi]

If the Khazar people converted en masse to Judaism, and if they form the larger body of Ashenazim (which I seriously doubt), the fact remains that they would have intermarried with other Jews over the past thousand years to the the point that their descendants would clearly be Jewish by blood.

You fail to account for the historical record of Jewish migration into Europe. The Khazars would have come from the east. But the records show the movement of Jewish settlement in Europe from the south into western and central Europe, and from thence eastward.