Child, my father was apparently on a Hitler death-list for, amongst other things, defending the Jews, and unlike you I have actually fought fascists, and have a broken nose to prove it. Zionists are the main racists nowadays, as you know.
I don't know the exact rules of your "The Nazis were mean to my ancestors" game, but I suspect I might beat you at it. Although I'll concede defeat in the "I got punched in the face" game, so we can call this a draw.
That being said, while I understand that the older generation can have some difficulties navigating the internet, a few minutes of searching will show
a. How prevalent belief in the Khazar hypothesis is among anti-semites
b. How sceptical almost all mainstream historians are about it
So if you don't wish to get accidentally mislabelled, I'd advise against treating it as factual.