So Tom Ricks statements are (in paraphrase) ..
1/ Benghazi event was politically hyped, and after the election that is declining.
2/ He proposed that 4 embassy personnel killed is in some way comparable to many security contractors killed in Iraq during a war.
3/ That's this is a "essentially a small firefight" and therefore there may never be a clear picture of the event.
4/ That Fox is biased and hoping the event.
Aside from adding some opinion logs to the political bias fire, only statements 2 and 3 are relevant to Benghazi.
I find it hard to understand how anyone can rationally compare the deaths of security contractors (aka mercenaries) in a war zone to what appears to be a planned attack on a US mission. It's an irrational comparison. The better question is how many other embassies are attacked in this way ? Or why this one at this time.
This was clearly not a "small firefight". By definition a firefight is a small arms exchange and this attack involved rocket-propelled grenades, hand grenades, 14.5 mm anti-aircraft machine guns and artillery mounted on gun trucks, diesel canisters, mortars. This so called military expert is either a liar or an idiot when he refers to this as a firefight.
Fox may well be biased in their reporting on the matter. Tom Ricks said nothing that wasn't merely political opinion/bias, clearly false or a grotesque tu quo que fallacy. If going onto a channel with a bias and spewing your own biases with falsehoods & fallacies is a win, then Tom Ricks won. Otherwise - not so much.