The Russians should have STFU and STF out of it, and for that matter, should just in general drop dead. They are the primary enemy of the US, and the source of the weapons and training used by generations of jihadists.
Furthermore, had Assad been allowed to fall, instead of propped up like the corpse he is, the unarmed protesters would have been in charge over a year ago. Instead, there’s been an upward spiral of violence and flow of weapons from jihadist states Iran and Saudi Arabia. That too is the fault of Russia.