Well, let's start with the morality of it.
Let me note first Hillary like the vast majority of our leadership doesn't really deserve power because they are products of an inferior political culture that should be done away with so we can start from scratch -- no salavaging the D.C. train wreck that currently exists. Unfortunately, by the same logic, Americans don't really deserve a democracy because we created and sustained that culture by electing them.
However, in politically realist terms, Benghazi is mostly a media invention woven out of the right-wing spin machine in a desperate ploy to sabotage Obama's 2012 campaign. Thousands of American soldiers died in Iraq, and its pretty much inevitable some of those deaths tie back to Bush Administration officials (chosen and administered by the President and his inner circle) and make for some pretty ridiculous stories. For example, any of the multiple embassy attacks in the Middle East that occurred during that Administration. That's because in war people die for the most ridiculous, most bureaucratic of reasons, simply due to the intrinsic limitations of the best plans and organizations. And worst of all, those bureaucratic reasons are necessary and proper to the long term stability of the government and military as a whole. Which is why they exist to begin with, instead of not exisitng.
Hillary doesn't deserve power, but it isn't because of Benghazi.
If you notice something good in yourself, give credit to God, not to yourself, but be certain the evil you commit is always your own and yours to acknowledge.