My conspiracy theory:
Chiney's weapons manufacturing co( I forgot the name) has its headquarters in Dubai and it's swarming with CIA, and it's known that most Indian and Pakistani extremist are located in the UAE. A "breach" by the CIA, using one or more Sheikhs to try to convince those muslims that such a operation will do the Islam cause great benefits.
Why?
Somehow I feel the Pentagon has no trust in Obama or his intentions. Such an event will definately put great deal of pressure on him, and a few more events like these may see the national and international security issues in the US move to the control of the Pentagon itself which will make Obama toothless.
Although I don't think that this story must be true or close to reality, it's just the first thing I thought of when I heard of the shooting.