The point that I was trying to make in post 6 is that the chap may very well be a Vietnamese or South East Asian national, born in the region. His apparent, to some, European/North American appearance (link, post 3) could be explained if his father was a European or North American soldier stationed or passing through his country around the end of WW2. Judging by the chap's apparent age and his appearance (link, post 3) I would have thought it a likely possibility.

If the chap is also trying to make some money out of his appearance, I would have no idea if he is or isn't.