What you say may be true. I did some research right after the Benghazi attack for a college assignment.
You have to remeber the time period. This was just before the 2ND or 3Rd debate for POTUS. They had to play down the terrorist angle, so they came up with the video lie.
The US had recently dispatched the Libyan and Egyptian governments and was fully behind the overthrow of Assad. You have to remember that all of those nations(as well as Iraq)were former Soviet client states. Russia was losing ground in the middle east.
Obama was pushing for a coalition war against the Assad regime, however he was getting significant pushback from the American people and international community.
They had created insurgent militias (ISIS) in Syria and were funneling arms from the vacated arms depots in Libya through Turkey, into Syria.
The Russians didn’t like this, of course, and warned the US to stop it. They even went to the UN with intelligence (hacked emails?) evidence of what was happening and that US was planning a false flag chemical weapons event to sway world opinion against the Assad regime. Which happened BTW.
The false flag event didn’t have the impact Obama/Clinton desired, probably due to the Russians leaking it to the UN. The Russian went to the UN again to stop the secret flow of weapons, but it fell on deaf ears. Putin out right warned the US to stop or there would be consequences.
The reason why no US forces were deployed to Benghazi, was because it was a planned attack, probably orchestrated by Russian special Ops and carried out by thier agents in the region. If we sent war assets to the area we would expose not only what we were doing, but it would have brought us in direct conflict with Russia. Russia had the evidence and would expose us to the world community.
At a minimum it would have created a huge International incident just prior to a presidential election. Hense the video lie.
This is probably the single biggest foreign policy blunder ever recorded. Because of this Russia now has influence throughout the middle east. They operate freely through Syria, have bases in Iran, have been asked to be stationed in Yemen, and are currently asking Turkey to use Incirlik AB (which we built), and it looks like they are persuading Turkey to leave NATO.
Just my .02
The part that nixes the Ruskies as being the culprits is just how quickly the Obama Regime pulled that totally obscure vid out of their backside vent hole as an excuse for the attacks by the jihadiscum.
They had it ready and waiting for the day to trot out to their faithful suborners of treason in the media.
like your evaluation