Maybe I have missed something but as far as I am aware none of us are speaking as representatives of the US government. For myself, I am not even American. We are individual human moral agents calling things as we see them.
I have no difficulty in unequivocally and unreservedly condemning the human rights abuses at Guantanamo Bay. Why do you find it so difficult to do the same regarding the human rights abuses of the Chinese Communist Party?
I would not and have not argued that nobody can criticise the human rights abuses of the US Government (or anywhere else) because there are other countries that are as bad or worse. Why do you seek to do this for the CCP?
As you quite rightly say: