The strange thing about an identity is that you only start to feel your own identity once you enter an environment in which most people have a different identity... To take my own life as an example, I started feeling Dutch when I moved to Denmark. I started to feel European when I moved to Japan. And the first time I felt like a "westener" was when I came to the Middle East. I think most of us define "what we are" mostly by what we are not... And similarly we define others by "how they are not like us".
So when I talk to Europeans, I will feel Dutch, but when I talk to someone from a very different background (be it Middle Eastern, African or Asian), I will probably feel western.
So to me, arabs are people from the Middle East, Africans are people from Southern Africa, but my concept of westeners is very weak... I don't see westeners, I see Americans, Canadians, Australians, French, English, Germans...
My guess is that it's the same for Asians, they'll see Indonesians, Malaysians, Vietnamese etc. Am I right Azi?