Can you honestly be so bereft of both honour and compassion that you can calmly turn your back?
Point of order: Sand can't be bereft of honour, as bereavement implies that he had the quality to begin with, then lost it. "Devoid" is a much better adjective.
Supposition. If nothing else, the US is getting a crash course in armed conflict in urban environments.
Your myopic philosophy doesn't allow for the introduction of a steady-state via some force external to the system, for example providing Marshall funding to the post-war German nation to ensure that they could use their efforts to become useful members of the international community, rather than disappear into a self-destructive, Hobbesian pre-civilization anarchy.
Also, creating an exit statement isn't restricted to before the conflict. (It is certainly advisable to have it beforehand, but its absence is does not prevent one from being devised during the engagement.) Your "get out NOW!" bleating is an example of a post-invasion exit statement, for example. Other, more sober voices, are just trying to incorporate other factors, rather than your single dimensional approach, namely "harm to US soldiers and cost to US Balance of Payments THIS YEAR". Like the fate of the innocent women and children who just happen, by accident of birth, to live in Iraq. Just like you, by accident of birth, happen to live in Iowa.