[Cronos]

Or are they Khazar Jews who are descended from a Caucasian ethnicity that adopted Judaism for political and economic power (so they wouldn’t have to fight the Muslims on one side of their empire and the Christians on the other side)?

The Khazar rulers were Turkic peoples who ruled what is now southern Russia and the Ukraine for centuries around the birth of Islam. They were turkic, not caucasian. They ruled over Slavic, Germanic, Irani (Alan), Ugric peoples, but there is no evidence that these ruled-over peoples ever converted to Judaism

The elites converted to Judaism -- it is conjecture to say they did it for political or economic reasons -- they could have stayed with shamanism or Tengriism

Also note that European Jews share the same genetic materials as Jews from the middle east, india, etc

[Ghost of Philip Marlowe]

Well, you’re wrong on most of what you said. But you repeat the common narrative very well, so I’m sure you got a gold star that day.

Read up on it. Start with Koestler’s The Thirteenth Tribe.