Justice is served?

Obama recently signed an executive order that will close a military detention center at Guantanamo Bay (GITMO) within one year. Obama then met with families of some of the victims of terrorist attacks on our country telling them that, "closing Guantanamo will make our nation safer and help ensure that those who are guilty receive swift and certain justice within a legal framework that is durable."

Two questions:

1. Is our military court system not durable enough to handle war criminals?
2. How will granting terrorists the same rights to our legal system as American citizens make us safer?

Proverbs 21:15 notes that, "When justice is done, it is a joy to the righteous but terror to evildoers." I don't get the sense that there is joy among the righteous over this decision nor that the evildoers in this case are shaking in their boots over the terror of being subjected to our justice system.