Assad has a loyal base in the Alawites and other minorities in Syria, who know they will be massacred if the Sunni-islamists
take over.
He may have his back to the wall, but he is not alone.
Go, Assad!
The Great rule of conduct for us, in regard to foreign Nations is in extending our commercial relations to have with them as little political connection as possible. So far as we have already formed engagements let them be fulfilled, with perfect good faith. Here let us stop. . . .
George Washington on Foreign Affairs September 19, 1796
Or basically we have dimwits and traitors in DC who want to assist in genocide.