Commenting on the remark, Russian Deputy Foreign Minister Sergey Ryabkov said on Thursday that it reflects a state of "emotional breakdown."
Meanwhile Alexei Fenenko, leading researcher at the Institute of International Security Problems of the Russian Academy of Sciences, explained to RIA Novosti what's behind the rhetoric and how the US will continue arming the radical opposition in Syria.
"The US will further try to arm the radical opposition in Syria, it is part of their strategy," the expert said.
"The Americans have invested too much into Syria to retreat that easily. Against all its rhetoric on Syria, any US attempt to backtrack will be regarded as a defeat, thus they will continue activating the radical opposition," the political scientists said.
"I am not optimistic on our prospects for further cooperation. Obama is becoming not just a "lame duck" but he is in dire need if doing outstanding before he leaves. The so-called "rescue" or "salvation" of the Syrian opposition might become some of these "outstanding events," the expert stated.