Corporate racism mostly. I find it Ironic that people complain about the relationship between xiaomi and the chinese government but will not mention the fact the Google have been spying on their customers for years now. But somehow only foreign companies have nefarious motives.

This is frequently because people don't trust that there's not spyware in them. Whether there is or not, the Chinese government's control over businesses in its realm is stronger than the American government's, and even less transparent.