Indeed. Color, or race or where you are from should not be a problem.
And if someone is honestly selling from Vietnam I find it not to be a problem. But if someone is selling from Vietnam and is trying to hide his identity and trying to pretend he is from somewhere other than where he is from, then, we have to be careful about what he is trying to sell and what his source for goods are.
This is the closest he has come to answering where he is from:
And it is not an answer. On his website it says he has a store in Downtown USA and then there is a link to the French version of TableTennis11, as though he is trying to present that his site is associated with TT11 and TT11 is in USA.
And a statement like "In downtown USA" as though it is a real location, shows that, either he is hiding something, or he does not actually know the USA. Perhaps it is a language thing. But he clearly is trying to avoid factual details.
So, no matter how fair I want to be, he is starting out by being dishonest. If he was transparent, honest, truthful, it would be totally different. Even if he started out dishonest, he can still change that. I have not seen that yet.
But the more important issues at hand are whether the goods he is selling are real or counterfeit. And we cannot tell. We cannot even tell if the photos he posts are the same goods as he would send if you bought from him. Because he is hiding so much to start.
