Actually what she said makes no sense whatsoever. First of all, neither of the two ways she characterized the attack where accurate. It wasn't a protest and it wasn't just "guys out for a walk who decided to kill Americans". It was a premeditated terrorist attack carried out by a known group of Islamic extremists.
Also, how in one sentence can she say it doesn't matter what motivated the attack. Basically, she said what does it matter why they did it. And then in the next say "it is our job to investigate and prevent further violence. Well in order to do that, it helps to understand who attacked you and why. So it does make a difference. And all of that talk is pretty hypocritical after her department spent the first week lying about who carried out the attack and why they did it. (Again, they knew it wasn't a YouTube video protest and they knew it was a premeditated attack carried out by Ansar al Sharia before Susan Rice went out and misled the American people 6 weeks before an election.