She’s not stupid, she’s lying.
Indeed. She claims a demonstration at the consulate was "hijacked" by "extremists" with "heavier weapons", and it "evolved from there".
Susan Rice is lying through her teeth, following Regime talking points to protect the Bitch of State and the Traitor in Chief.
We have, for example, the testimony of Ethan Chorin, who was in Benghazi with Dr. Thomas Burke of Mass General, Boston. They were there to assist Libyan doctors in setting up an Emergency Room operation at the Benghazi Medical Center. They and the Libyan doctors were slated to meet with Ambassador Stevens Wednesday morning.
Tuesday evening, Chorin was on the phone with the Ambassador's security detail arranging the meeting, when the call ended abruptly with a shout of "We've got a problem here". Then Chorin and Burke were left to hole up in their hotel listening to sounds of the distant violence. And the Libyan doctors ended up treating the Ambassador unsucessfully at the BMC for severe asphyxia.
IOW, no demonstration, no build-up. Just a sudden surprise attack by Al Qaeda. Which we now know would not have been a surprise, but for the incompetence of the Obama State Department.