In recent years I've noticed both that, there is a theory that we might have followed different paths in different places after all, and that the Chinese anthropologists see the Chinese as having a different path.
As for the first, it will be worrying if modern genetic techniques show some truth in it. Especially if people react against globalisation (which isn't all bad capitalism, as some make out). As for the second, I can say from living in China that they are nationalistic, proud and can be exclusivistic in their thinking. And with China becoming foremost in the world and globalisation...
But let's hold onto the fact that we are all in fact of the same origin because all humans can successfully interbreed! I share your concerns.