Why are white people called Caucasian?

The Caucasus is a pretty small place. Seems odd, right? Well you remember, Prometheus was strung up on a rock in the Caucasus, he being homonymous with Lucifer. I was pondering this question ten years or so ago, thinking, well the Khazars came from that area. And then I found Benjamin Disraeli's passage talking about "You cannot destroy a superior pure Caucasian race, it's a law of nature," talking about the Jews. Bingo.