Not the whole country. The Iranian people who have not been radicalized (a powerless majority, sadly) are pro western and worthy of support. Instead make a list of all the mullahs and bad actors and execute surgical missile strikes on their homes and offices, all within a 12-24 hour period. Bring the government to its knees in one day. Execute a Marshal Plan like strategy to rebuild their government/economy with civilized values and outlaw any radical elements under penalty of death.