[kabumpo]

Actually, one of the most famous Jewish writers of the 20th century wrote a book expounding this theory.

[rmlew]

Actually, one of the most famous Jewish writers of the 20th century wrote a book expounding this theory.
You mean the communist anti-Zionist fiction writer Arthur Koestler? Koestler was a hack, who ignored actual history and research. Do yourself a favor, stop digging. I have forgotten more about Khazaria than you will bother to learn.

[Jewbacca]

“Actually, one of the most famous Jewish writers of the 20th century wrote a book expounding this theory.”

Yes, and he repudiated his own theory upon repeated genetic studies and better historical records.