Nice to know you've foresaken your humanity. At least, it explains your attitude.
The law is the law.
Humanity - these guys are living in conditions that are most likely centuries ahead of where they came from. The every fact that they very meals (and even have a menu) every day is probably more than they ever had.
Gitmo is not some mysterious torture center that some think it is. It is open to the Red Cross, Congress, military Lawyers, private Lawyers, etc... I would think by now that if it was a torture center someone would have seen the rack, blood, electric chairs, etc...
These men were caught commiting a war crime. Fighting in a war without uniform is indeed classified as a war crime and removes you from the protections of the Conventions. It also removes protections from due process as you then fall under military justice where this is not guaranteed. Perhaps they should have considered this when they decided to pick up arms and fight It is not about humanity - it is about criminality. If US soldier committed war crimes everyone in the liberal world would want them under a firing squad within hours, forget their chances at due process.
I may be mistaken, but I do not recall any time in American history where criminals were simply let go. I also cannot think of any civilized nation that does not detain criminals.