She was thinking of her impending Prez run and remembered the one matter on which lib voters really gave Bill hell was the way he did nothing in Rwanda, when the Hutus and Tsutis had their rambunctuous machete/screwdriver orgies.
She didn’t care about the details really, but was only hearing, “And what role did YOU play, Hillary, in the Libyan civil war...?”
Actually she caused and then intensified it.
I believe you nailed it. Her desire to become prez far outweighed her desire to do the right thing and serve her country.