Moral weakness will only embolden the enemy. The taliban will see it as weakness. And of course they are right at that level. It is weakness...
Bingo. The key point here is not that many people cheat on their spouses, or that the Taliban themselves are immoral, or anything like that.
The key point is that the Petraeus affair weakens us, and strengthens them. Propaganda can be a very powerful weapon.
BUMP! BUMP!
The universalism of Islam, in its all-embracing creed, is imposed on the believers as a continuous process of warfare, psychological and political, if not strictly military. . . . The Jihad, accordingly, may be stated as a doctrine of a permanent state of war, not continuous fighting.”2 — Majid Khadduri
The Quranic Concept of War
http://www.carlisle.army.mil/USAWC/parameters/Articles/06winter/win-ess.pdf