China is putting millions of Uighers in concentration camps[1].

The response from the international community has been crickets chirping.

[1] https://www.reuters.com/investigates/special-report/muslims-...

They successfully swept Tiananmen Square under the rug without much internal fuss, so I wouldn't underestimate the Chinese state in this regard.

Also, "the world" is too homogeneous a group to predict it would all simultaneously go after China for some single incident.

Who is in the world? What would their motivations be for "reacting" to China? And more importantly, what counter-motivations exist that could sway them from doing so?

If you take all this into account, you'll find the group willing to go "against" China for anything is actually very small.

Edit- Added section responding to the "world" comment.

Killing armed rioters would get much less condemnation than killing unarmed protesters.

What would they do? The us economy is utterly dependent on Chinese manufacturing.