But it's not just the US (or just Gitmo) -- read about the treatment of refugees in Australia (tl;dr: it's better than Gitmo, but not good by a long shot -- http://mitahungerstrike.wordpress.com). And I don't mean to pick on Australia, because the Australian government is no more (or less) guilty than the governments of much of the developed world, I just want to make a point that we all are having terrible things done to other human beings in our names.
It's a damn sad state of affairs.
Refugees, including children, are held in prisons. Sometimes for many years. All without trial. Why no trial? Largely because they have not committed any crime -- it is quite legal to seek asylum.
This is wedge politics, pure and simple.