Watch the movie 13 Hours sometime. If anyone said fuck it let them die it was the CIA station chief who refused to let the ambassador's security detail go rescue him until over 2 hours had passed since the attack began. Then, there was the fact that there were no assets around Benghazi other than one surveillance drone (with no weapons). And, they tried to mount a rescue from Sigonella, but didn't have the required equipment, so they tried to mount a rescue from Aviano Italy, but by the time they got things together, it was too late. Nikki Haley had her security detail with her and readily available to defend her, as well as had access to aircraft to get out of the area.