Why hasn’t ISIS attacked Jordan? First, Jordan isn’t a failed state as are Syria and Iraq. It has an army and an air force and a BYK. They will fight. Second, if ISIS heads too far west, then ISrael will get into it. That won’t be calibrated airstrikes and under-motivated conscripts either. Third, ISIS is still busy in Syria and Iraq.
Why hasn’t ISIS attacked Turkey? First, Turkey isn’t a failed state as are Syria and Iraq. It has an army and an air force and an SPI. They will fight. Second, the Turks are Sunni Muslims, and Turkey is the conduit for foreign fighters. Third, ISIS is still busy in Syria and Iraq.
Can the government of Iraq reconcile the Shi’a majority with the Sunni minority? No. The Shi’ites had their chance when the Americans left. They threw it away by persecuting the Sunnis. Now, in a moment of great danger, the Shi’ites want to make nice with the Sunnis. You can see how the Sunnis would be suspicious. What happens when the crisis passes? Back to the previous behavior? Furthermore, it isn’t clear to me that the government put in place after the United States overthrew the Maliki government last Fall are doing more than putting up window-dressing to pacify the Americans. So, I suspect that the country will have to be partitioned.
Can ISIS conquer Iraq? No. Two thirds of the population are Shi’ites; twenty percent are Sunnis; and the rest are Kurds. The Kurds will fight and the United States will support them. Iraq’s Shi’ite majority would not have anywhere to run. Their backs would be against the wall. The civil war in Iraq during the American occupation showed that the Shi’ites are capable of great violence. They would fight hard—even savagely—against ISIS. Iran will commit troops to prevent the fall of the Shi’ite parts of Iraq to ISIS. The Sunnis areas? Well, that’s another story. Perhaps Iran would be content to have Kurdish and Shi’ite Arab buffer states between itself and an ISIS caliphate. How would the United States regard this outcome? “Another fine mess.”
Can ISIS conquer Syria? Well, that’s yet another story. Years of very destructive civil war have ravaged the country. This has eroded the strength of the Assad government in ways that are not yet true of the government of Iraq. Recep Erdogan, the president of neighboring Turkey, wants the Assad government gone. Saudi Arabia wants the Assad government gone. The Russkies and the Iranians want Assad to stay. My suspicion is that nobody will get all of what they want. Like Iraq, the country will have to be partitioned. I believe that most of the Alawite and Christian populations live in the west of the country. Like the Shi’ites in Iraq, they will have their backs to the wall (in this case, the Mediterranean) as ISIS advances. They will fight hard to hold it, while being ready to yield the rest of the country to ISIS. A revived Medieval Principality of Antioch could emerge to abut Lebanon. (Or perhaps the two will merge.) Between Hezbollah in Lebanon and Assad in “Antioch,” Iran would have a couple of client states on the Mediterranean. On the other hand, such a retreat by Assad would bring ISIS that much closer to Israel.
 Brave Young King.
 Semi-Psychotic Islamist, as President.