Prisoners at GTMO are effectively outside the normal criminal and military justice systems, hence vulnerable in a number of ways to abuses. It highlights the loss of rights in the rush to pass the Patriot Act. The detainees are being held, in many cases without being charged with a crime, yet not being classified as prisoners of war, so the .gov claims they are not bound by the
Geneva Conventions, since the detainees are not signatories. Essentially, the liberals feel that GTMO is an embarrassment to the US. I, on the other hand, see it as en effective way to segregate these potentially dangerous individuals from the US mainland, provided they eventually either charge and try them, or determine that they pose no threat and release them. Holding people indefinitely without charge smacks of totalitarianism.