If you were an instigator, either Moslem or political, how much would you pay someone to produce a film you were sure would stir up the Muslims? Then when would you post it on YouTube? Probably close to some important date. Then you would spread the word, especially among the extreme radicals, because their Internet access would be limited so you would have to get the word to them. Now, arrange things so a heavily armed contingent just happens to get together on Sept. 11, 2012.
Know that the security is in the hands of two very capable men who might put up enough of a fight to deter your forces. So you have folks they trust paid off to eliminate them first. As it was stated, some of the guards aided and abetted the so called rioters. Now throw in a link that the one who made the film is Israeli.
I hope these few suggestions opens some of your eyes as to what just might have happened, as the master puppeteer plays his stage. I only hope it backfires on him and he doesn't come out like some great peacemaker. We have had enough of them win prizes already.