Op-Edge: Why is it almost impossible for Kurds to secede from Iraq?

The official referendum for Iraqi Kurdistan is soon. The referendum which is designed to sense the will of Iraqi Kurds about independence from Iraq and starting a Kurdish state among Iran, Syria, Iraq and Turkey. Theoretically, this might seem possible since Kurds already enjoy an autonomous rule in northern Iraq,... ... and chaos in Iraq in the past 4 years, gave the KRG  a better experience in self-rule away from Baghdad. The expansion of ISIS have literally cut Iraq into two halves, an Arabic half, and a Kurdish one. Geographically speaking, this offered the Iraqi ...