Putin is in the process of exposing that lie for all the world to see.
Obama's Secret War in Syria. And, we are arming and training Jihadis to carry it out, with us Specops and CIA embedded.
Pursuing Regime Change, no matter the cost to everyone, on behalf of a personal vendetta by the Saudis.
And, all of it illegal according the US Law.
That's why Obama and Kerry and Carter are so freaked out. They will be exposed.
The "moderate Syrian opposition" is mostly a myth created by the Obama administration and by John McCain. Not all of the anti-Assad fighters are ISIS by any means, you have other Sunni militias like the Al Quaeda-affiliated Al Nusra front etc, but they're not exactly the democratic, western style moderates that we keep hearing about.