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 ... ... 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... ... infrastructure through which crude is exported via Turkey to global markets. For the USA, it is not satisfied with the Turkish rapprochement with Moscow, and might use the...