I do not think that Nike had anything to do with this, I think Lebron was the one who built this team to be fair. And aside from Embiid, who is clearly not American and not like "oh he is black" type of racist thing, dude spent most of his life in another nation and was born there, if you are born on a nation but you have parents who were born in another, then I support you being on a team for a nation that you are born in, but this dude wasn't even born here.
Aside from him, they brought in some of the big guns and I am sure that they are going to do very well. I do not think that anyone will get even close to them, this isn't some ok players team, this is the stars and nobody has any players that is even close to this level.
Based on his bio.
https://en.wikipedia.org/wiki/Joel_Embiidhe is an "Cameroonian / French / American"
So he could play with either of these three national teams,
... But he chose America, so I think there's no problem with that. In our national team, there's even one naturalized citizen who's a foreigner, but since it's allowed, that's fine.
I think we are talking too much about Brown's complaint. It's time to rest that and give Team USA peace of mind and wish them the best.