“Where is the unclassified proof that Assad used the gas rather than his Islamic opponents?”
If classified proof is good enough for Reagan, Bush,WBush, Clinton....It’s good enough for the nitwit Obama.
But seriously, we have confirmed Sarin tests on scene in Sunni / Rebel villages. Of course Assad did it, we even know which units carried it out.
That being said, it is fruitless and against US interests to assist the Sunni AQ affiliated rebels.
If Assad Pest Control is spraying for Salafist cockroaches, how is this a problem for us?