You make some excellent points, but I would bet that money and missiles were involved in some way. Stay tuned, and don’t put the tin foil hat in storage just yet.
The key is that something was so important that a U.S. Ambassador needed to be in Benghazi, while the CIA who was there (1 mile away!) wanted or had no part in the original operation.
Mustard gas?! Known Al Qaeda bad guys being feted by Stevens?
Something.
It was so important that the White House didn’t want to call in the Defense Department or even Hostage Rescue when the op went bad.