The US State Dept is not itself tasked with logistical and tactical analysis and deployment of security for consulates and embassies. That is a function of the military.
Either the deaths were 1) poor military implementation, 2) blowback for merely being there or they were a planned payback or warning of some kind. Possibly it could have been a bit of both 1) and 2).
Throw in the fact that all this is occurring in a war zone and that bad logistics can happen even in peaceful settings then what good does upbraiding Hillary accomplish unless there is some hard evidence she plotted a payback or a mafia type warning? War is hell and bad things happen.
The real issue is we shouldn't even be there and our presence brings blowback. Rand failed to even mention it. He's just left looking like a pariah...
~wobbles but doesn't fall down~