Afghanistan is now perhaps the most dangerous country in the world, controlled by Taliban terrorists who are sheltering dozens of anti-Western jihadi groups while torturing, raping, starving, and killing their Afghan opponents. Yet the one person who could make a credible claim to be the leader of an opposition group to overthrow the Taliban has been unable to draw international support or unite fellow Afghans behind him. Ahmad Massoud, the 33-year-old son of an anti-Taliban war hero, leads the National Resistance Front (NRF), which is concentrated in the Panjshir Valley, a lush and mountainous province close to the capital, Kabul,...