How can peace be restored in Iraq?

Partition it into Sunni, Shi'ite, and Kurdish nations, and force a global treaty of military non-intervention and total arms embargo in the region for at least 100 years. Then spend a few trillion dollars rebuilding the country. Of course most of Iraq has to be evacuated and abandoned. Climate change has rendered it uninhabitable, and the US military has contaminated the soil with depleted uranium. DPU causes terrible illness and horrifying birth defects, and will remain dangerous until after the sun engulfs the Earth.

It can't - crazy Islam.