Most of the casualties in Syria were caused when the US-backed FSA and ISIS massacred civilians in the eastern provinces of Syria, although some were killed as a result of action by the government forces.
Obviously the Syrian government have smart scud and smart barrel bomb...
If you think Russian puppet have the right to kill civilian just tell it please, it's far more respectable than hypocrisy...
And do not forget baathism was a socialist fascist totalitarian ideology about "create a new Arab" and used many social engineering tool like deportation... Russia always support good people...