Those who fail to learn from history are doomed to repeat it. You could say that one of the good things about Vietnam is that it helped us avoid another horrific experience and get us out of Afghanistan. This would not only help us but help the people of Afghanistan, as we are doing them no favors at the moment.
As a Vietnam Vet who had friends in the White House who would not listen to his appeals to sanity, this letter has both a feeling of redemption for our past mistakes and a return of sanity among the leaders of our nation.
This is a superb proposal.