The so-called experts give various fallacious arguments for increasing our military presence in Afghanistan, as follows:
Win the war against al Qaeda. This makes no sense because the al Qaeda left Afghanistan long ago, and they are quite happy in Morocco, Indonesia, Somalia, Sudan, Yemen, etc.
Liberate the people from the Taliban. But the Taliban are mostly from the Pashtun ethnic group who want to restore their rule in Afghanistan. The Pashtun make up nearly half the population so we are effectively fighting the Afghan people.