I don't think that's an accurate description of the Russian position concerning moderate rebels. (politics.stackexchange.com)
That might be true in some abstract sense, but it misses the reality that ISIS and the Assad regime are fighting relatively moderate rebel groups rather than each other. (firstthings.com)
Sergei Lavrov said the US had broken its promise to separate the powerful Jabhat Fateh al - Sham (formerly known as al - Nusra Front) and other extremist groups from more moderate rebels. (citifmonline.com)