falcon900
falcon900, good post. The BIG question here is not necessarily about why an aircraft crashed, it is about why 11 people on the ground were killed.
I'll take your organisers risk assessment discussion one step further - does the regulator need to have a close look at it's role in air displays? Indeed, the very fact they commenced a review of their procedures only 24hrs after the crash indicates that they understand the need to look much further than the actions of the pilot and the airworthiness of the aircraft (something that AAIB will clearly sweep-up).
To me, this accident and it's impact most certainly wasn't brought about by a single point of failure; to follow the traditional route and focus on the pilot's actions would be the most inappropriate course of action for us to follow.