My youngest son served in Afghanistan as a Sgt. in the 82nd Airborne. He came back the first time with stories of a 15th Century War Lord society that has no interest in Democracy. We went there not to save, but to punish Afghanistan, for allowing terrorist training camps to flourish there. As far as "half-hearted"? Losing 2,000+ troops there was a little more than "half-hearted", but I get your point.
Afghanistan has been called for centuries: "The Graveyard of Empires". The Afghan is a warrior by nature, and possesses a "fanatical belief in Islam". He will never lay down, and you will never dig him out of the countless mountain caves. Alexander the Great, England, and the now non-existent Soviet Union found this out. Now we, like them, are "financially broke" by attempting to "alter history" for a country that is not interested in changing.
As far as spraying them with "agent orange", I would ask WHY? They are, like Mexico, only catering to the demand to the American population of "dope fiends". Why not just do away with the "dope fiend"? They are of very little value to society anyway, and are more of a burden than anything else.
Our problems overall, are not a problem of "nation building", but the attitude of such behavior. It is a "spiritual problem" that America has that is causing all this. We as Americans "collectively" are moving farther and farther, AWAY FROM GOD. The "farther we get away from God" the worse our country becomes, and the more confused our leadership becomes.
We are finally at the threshold of "an election where there is no lessor of". Either candidate will move us farther away from the "Light of God", and farther "into the darkness" of Satan.
Correct the "spiritual sickness of ignoring God", and the rest will take care of itself. You, the American voter may compromise, but God will not. You are only fooling yourselves.