I'll play.
I think they had a plan put together and the video protest provided the necessary cover/diversion to carry out the attack. Therefore, the albeit clumsy talking points you so vociferously stomp your feet about and blame for Mr. 46% Venture Capitalist's loss aren't really inaccurate. Opponents of this admin simultaneously call this the worst terrorist attack since 9-11 and turn around and demand complete answers in a matter of days. Perhaps they wanted to create an election year issue as badly as they accuse the Admin of trying to avoid one. Just maybe..
They didn't just "have something planned". Let's not pretend that this was Oklahoma City and some idiot blew up a soft target full of daycare kids and bureaucrats out of the blue. Nobody snuck this in the back door of a protest march. The place had gone to shit and everyone knew it (again, read, please). Every other significant Western interest withdrew in the preceding six months as the security situation fell apart. We don't have to speculate: we have cables from the dead guy asking for more help, which went totally unheeded, as we all witnessed a week later. This isn't the "Somewhere on Earth some bad guys might be trying to hijack a plane from somewhere to somewhere on some day" PDB that gets RJ in a lather. This is the late Chris Stephens saying "It sucks right here, right now, somebody do something, fast." #oops You know what Hillary Clinton wasn't going to tell Meet the Press? That.
So somebody else went and said something....different.