1. Suddenly, out of the blue almost there appeared in the Middle East a powerful force seemingly moved by a desire to set up an Islamic state, a Caliphate no less.
2. And this force has been amazingly successful. They have literally conquered swathes of Iraq and have set up a Government. They are set to advance further and the Iraqi forces have not really been able to stop them.
3. Where did they come from? Just like the Taliban they were created by the United States of America.