Khazars were a Turkic tribe. Their language was Turkic. They converted to Judaism. They were eventually conquered by the Rus (Vikings & Slavs)

Modern Hebrew is a rather recent linguistic construction from biblical Hebrew.

Dude, all of your references with regard to the Khazars are web sites. You may also want to read a few historical, and well researched books on the subject. I highly recommend anything by Kevin Alan Brook, one of the leading, if not the leading scholar on the subject.

Thanks to Joey for compiling the research.

Jeff Zolitor