Why did Hillary let four Americans die in Benghazi?
The compound in Benghazi wasn’t an embassy nor was it a consulate. It was a temporary diplomatic mission being considered for permanent status (in fact, Ambassador Stevens was there working on that very process).
Because it was neither a consulate nor an embassy, it did not have the same level of security as those types of facilities would have. They had requested additional security, but so had most diplomatic compounds in the region. The diplomatic security budget was maxed out, and the increase requested by the executive branch were not granted. There were no actionable leads prior to the attack, though the intelligence community had pointed out a general instability, and so no additional security budget was allocated. The State Department assumed, wrongly, that maintaining a low profile was the best way to protect the compound until it was granted permanent status.