A primitive, tribal, people whose nations were forcibly drawn up by the UN after WW2 haven't had generations to build on a stable functioning culture. After witnessing our failures the past decade, I firmly believe that Democracy has to be earned. That a proper groundwork must first be culturally established through generations.
Learn from history how the Western world progressed from simple tribes. We grew bigger tribes and called them Kingdoms. Many of these Kingdoms eventually became stable enough to foster an economy. From commerce came riches. From riches came powerful men separate from the King, or dictator. From these rich men came the notion of Parliament and Congress, of voting. Thus Democracy was born.
It took us nearly 2,000 years to move from Barbarians to Democracies. Iraq had no chance in hell in a mere decade. They need to find their own path forward, through dictators who keep the tribes together. Saddam was such a man and we killed him. This reverts Iraq back to anarchy and tribalism.