So you can only go back to a "German professor" for your history, only back to 1752-1840.
That's as far back as anyone can go because he invented the word. IOW, before he thought it up, it the word 'caucasian' didn't exist.
What year was it when those "ten tribes" went captive?
How is that relevant to your specious claim about the history the word caucasian?
Better start digging you got a lot of time to catch up.
Better start thinking; it will no doubt drown out those voices in your head.