It seems the Shi'ite Iraqi government and the Iraqi Kurds are close to open war over the city of Kirkuk.

This means the two forces that did the most to defeat PISSI could be about to be at war.

I see nothing sacred about the borders of Iraq, or unity of Iraq. That was an artificial construct created by the UK and France at the end of World War I. Dividing Iraq into three parts might be the only way the Sunnis and Shi'ites can stop fighting each other. Their conflict, which became murderous after the fall of Saddam Hussein, was the soil from which PISSI grew.