Well the enemy certainly knew when, where and how to kill Ambassador Stevens. So apparently Hillary was correct when she said What difference does it make. Obviously when our enemies have access to our private emails, there is no way to stop these attacks from occurring.
That is a dreadful scenario. What if Hillary was openly discussing events concerning Benghazi, and foreign services intercepted those emails and passed them on to Islamist terrorists? She could have discussed what he was doing, when he would be there, the size of his security detail, and how heavily they were armed. And what if she wrote that in the event of an attack, no additional help would be authorized to come to his assistance.