“While it is difficult to equate to compare the Pakistani agreement with with any that Washington is contemplating, the Pakistani experience underscores how badly wrong ‘peace deals’ can go.”

Entirely correct. Which is why are peace deal with the pro-Jihadist Sunni extremist groups in Iraq was such a profound mistake. The pay-off deals with American forces just allowed them to bide their time. They will tell any journalist that ask that they will never peacefully live under a Shiite-led government. The recent suicide bombings illustrate that clearly enough.