Yes, it's easy to contrast Vietnam against Afghanistan. But the similarities are more important.
We don't belong there.
We can't win.
Our continued presence costs too much in life, good will, and money.
Al Queaida is not in Afghanistan.
We can't win a war on terrorism via conventional military.
We were welcomed years ago but we have outworn our welcome and the longer we stay there, the more blood will flow, the more Americans will die, the more Afghans will die, the more money we'll waste, and the more enemies our presence there will foster.
We must get out.
1 year ago