It is quite obvious, that like in other cases of "spontaneous" mass public outrage, it is a well planned and organized. I would like to speculate on the reasons behind this plan:
- Show of force, to make the infidels shake, while reassuring their supporters.
- An easy way to rally supporters to their cause, to radicalize the public opinion in Muslim population, further alienating it from the western world.
- To keep the public attention from the matters concerning scandals in Islamic countries, like Iranian nuclear program, Hamas victory in the PA and etc. I don't know if the Iranians are behind this, I'm sure that Hamas isn't, but unquestionably they use it for their benefit.