Second-chances are deep in the Christian heart, but how to prevent kindness being taken for weakness?
Terrorism is a form of guerilla warfare where individuals seek to gain access to military targets by means of civilian infrastructure, transportation, etc.
So when someone who previously supported terrorism claims to be reformed and seeking a second-chance, there is no way to establish whether or not she will re-radicalize at some point in the future when she is in a more effective position to re-militarize.
And yet there is the possibility that at some point the people who are currently and/or historically radicalized into terrorism/support, will truly reform and seek nothing else within peaceful societies besides the basic liberties, political freedoms, etc. that presume respect for human life, liberty, and pursuit of happiness.
So, imo, there can come a day when terrorism and political strife are so far behind us that we have no reason to continue to suspect former terrorists may re-radicalize. However, in the current global political climate, it is simply naive to imagine that someone who asks for a second-chance can be completely trusted to never abuse leeway granted.
As such, I think it is important to support the basic well-being of prisoners of war, but not to end the war until time has healed all wounds, so to speak. We must realize that humans are capable of lying and cheating and manipulating in whatever ways they can get away with to pursue abusive and exploitative goals of war and otherwise, so creating peace in the aftermath of war requires not being too hasty to assume that re-radicalization can't quickly occur within any situation that appears to be peaceful.