20 years ago, Iran (80 million people) could not win over Iraq (18 million people) in a conventional warfare. I believe that today Iran's military capability is comparatively much lower that it used to be. Both gulf wars showed that the military gap between developed countries and developing countries has become bigger and bigger.
Judge orders Jerusalem Gay Pride attacker to undergo psychiatric evaluation (Haaretz)
from the article: Iran nuclear bomb could bring military balance of power, expert says