I know what you mean.
But here in Italy, for the example, are the immigrants who get the most humble/hard jobs while italians get the most confortable jobs.
It's not the contrary!
I know that chinese law contains many facilitations for minorities; for example, they can get access to universities more easily. But the problems comes when some of them don't want to go to han-chinese made schools and still demanding better life condition.
I know that this sounds like they're wrong & we're right, but just remember that their land belongs to China because we won the war, and in order to gain consensus from local people, you should be tollerant, you just cannot go there and act like the new lord; specialy when they feel you as different from them.
Anyway, from a strategic point of view, XinJiang has oil, and recently they've also found the biggest iron minefield in Asia, so we cannot permit ourself to lose these territories. This is why USA & Associates may have tried to destabilize this region.
I understand what you are trying to say, but please don't equate immigrants with minorities.
Having lived in Europe, I have to say that racial discrimination is pretty low. The same has been my experience in the US. Sure, it is difficult to get a job, but that is due to Visa restrictions, not racial bias.
You can't treat Uygur people like you would treat immigrants into China. If you won the war and control the land, they are now your people. You should treat them as equals, not immigrants.