China has removed all human rights for over ten million Uyghur Muslims. Including freedom of movement, freedom of religion, tight restrictions on behavior, tracking of all communication and movement, restrictions on who you can meet or talk to, tracking of all Urghar family members in China or abroad, non-existent freedoms around speech and expression, total lockdown on press investigation or discussion, forced re-education.
And then for at least a million Uyghur Muslims, they're outright physically and mentally torturing them in camps through forced programs to destroy their culture and beliefs.
Please enlighten me as to how that compares to what the US is currently doing with Guantanamo. I believe the detainment facility at Guantanamo should not exist and should have never existed. There's an important on-going debate there. There's no reasonable comparison to be had between Guantanamo and Xinjiang, whether in scale, intent, or context.