I don't see how you can be so sure the prisoners are most likely to be (if given the chance) terrorists now. I'm sure many will harbour extreme hate after what's been done to them, but most people don't deal with extreme hate by blowing other people up. Long-time prisoners of the FARC aren't given the third degree to make sure they don't intend to blow up Colombians or even go on a revenge spree against the FARC.

Maybe many of these people just want to go home and try to forget the last 10 years of their life?

All that said I understand that it's a terrible position to be in, having imprisoned these people for such a long time. The thing is, it just keeps getting worse and worse...