I didn't say communism is non-discriminatory. Your willingness to jump from "racism" to "discrimination" demonstrates you don't understand the topic at all.
What about China and The Uyghurs?
China absolutely has a problem with Han supremacy and assimilated European racism, no doubt. But the situation with Uyghurs is not evidence of it. The situation with the Uyghurs, quite literally, is only framed as an Islamophobic "racism" problem by the white supremacist Islamophobic West. When the Arab League surveyed the entire situation, not only did they not find any evidence of Islamophobia, they actively approved of the Chinese program. Why?
Because the problem in Xinjiang is the problem of manufactured extremism. Manufactured by whom? The US and UK primarily. They have a decades long history of training, arming, and even fomenting Islamic extremism in the entire region (go look at where exactly Xinjiang is on a map). Remember the Mujahideen? Remember how the US created al-Qaeda? Remember how the current president of Syria had a huge bounty on his head for being a literal head-chopper in ISIS but then it turns out he's been actively working with the US military intelligence apparatus for at least 7 years? Yeah, so the US has been continuing their 50-year program of creating terrorist extremists and they were doing it in Xinjiang with the Uyghur community. The US and UK have built a substantial program of reinterpreting Islam to justify terrorism and spreading that in isolated and economically under-developed Islamic communities to create terrorist cells, very much like what the US did with Evangelical Christians right here in the USA (and most terrorist attacks in the US are from white Christian who were radicalized, even if tangentially, by these programs).
So again, why did the Arab League approve of China's program in Xinjiang? Because it was actually effective. The number of terrorist attacks in Xinjiang plummeted following China's implementation of their program. Economic opportunity was expanded, education, literacy, and health outcomes all skyrocketed. Uyghur women in Xinjiang had massively expanded academic, economic, and family-planning opportunities. It's honestly a huge achievement, and one that the Arab League would be highly interested in understanding - the first ever deradicalization program aimed at Muslims radicalized by the decades-long Western radicalization program.
So, what about China and the Uyghurs? Not a racism thing. Not a discrimination thing. Not a Han supremacy thing. It's an anti-terrorism program aimed at threading the needle, maintaining the Xinjiang autonomous region while neutralizing the radicalization threat from the West. And it's working, not just well, extremely well, and the Uyghurs in Xinjiang every year are posting continued population growth, positive academic growth, positive economic growth, and they're all still practicing Islam.