Encapsulated by this post from Powerline's "Hindrocket" (a regular guest on CNN's Reliable Sources) approvingly linking to a Ralph Peters op-ed in the Fox News sister publication, the New York Post:
This morning, Ralph Peters says out loud what many have been thinking about "our prisoner problem" in the wake of Hamdan, Abu Ghraib, etc.:
"Violent Islamist extremists must be killed on the battlefield. Only in the rarest cases should they be taken prisoner. Few have serious intelligence value. And, once captured, there's no way to dispose of them."
Aside from the obvious war crime, the "good" military powers had finally figured out by the 20th century that such a policy is irrational, because it creates a fight-to-the-death incentive for the enemy.