U.S. goal: Transfer prisoners

What the fuck? Why would we want these people in their home countries? What if their home countries are part of the Axis of Evil? Or if they're from Saudi Arabia or somewhere that is our "ally" yet seems to have a lot of citizens that don't like us. What if thier home countries have some aversion to holding people prisoner without charging them with anything? You know, like the US used to.

Why wouldn't we want them in Guantanamo Bay, anyway, since there's nothing wrong going on there? Couldn't we just get rid of the few bad apples?