Americans are generally sentenced to prison for committing specific crimes. Sure there may be some things you think the law should decriminalize (do vote), and also, sometimes innocents are imprisoned, which absolutely should not happen. But our prison system as a whole is not comparable to the indefinite detainment and reeducation of people purely due to their ethnicity or religion, which is happening with Uighurs.

A better comparison would be Japanese internment camps - I don't think anyone is defending those anymore.