If the Khazars all became Jewish when their king converted, and the name "Cossacks" is a later form of "Khazars," then why weren't the Cossacks Jewish? That part's a bit confusing, no?

Interesting, by the way. I always knew Shatner was Jewish; I think Jews tend to play "Jew, not a Jew" so we find these things out. Leonard Nimoy is a much more observant Jew than Shatner, by the way.