THE ongoing confrontation between Afghanistan and Iran is a classic example of radical Shias taking on radical Sunnis. Ruled by a Shia clergy since the late Khomeini's Islamic revolution in 1979, Iran has now come face-to-face with an unstable neighbour like Afghanistan where Sunni mullahs, known to the world as the Taliban, are in power. Both emphasise their commitment to Islam and yet they are unable to co-exist. In fact, the Ayotollahs who rule Iran consider the Taliban illiterate and lowly while the latter privately condemn all Shias as "kafirs" (infidels).