Caucasians live in places alike A=rmenia, and Georgia and Azerbaijan and in Chechnya where they are being massacred at present by Russians, who refer to the Chechens as "blacks".
Using the term "Caucasian" to mean "white" is as accurate and as offensive as using the term "Ethiopian" to mean "black". And black and white aren't accurate either -if I'm asked what colour I am I tend to say I'm a sort of blotchy pink.
I wish humans were like cats, covered in fur. I've got a black cat, a ginger cat and a tortoiseshell cat who are sibklings. I haven't a clue what colour they arer under the fur.