I'm not sure what you're saying here. The parent is talking about rape and forced sterilization by people in positions of power in these camps. Your link is just talking about prison rape. There's no mention of forced sterilization. There is discussion of it talking about guards (4% of inmates are sexuality assaulted and <10% of those cases are by facility members) but the data is both old and low and the article talks about the US extending legal rights to inmates (2003 Prison Rape Elimination Act) whereas China's official claim is that there's nothing bad happening (they're just "reeducation campus"). No one is condoning prison rape in the US, especially prison rape by facility members. But these are drastically different things.

I don't know how someone can compare these things with a straight face.

This is just whataboutism. You can care about both these issues, it's allowed.