All of these Georgian-Ossetian thing is full of both Georigian and Russian lies. The fact is Ossetians don’t want to be a part of Georgia and there must be a good reason why. Georgian atrocities are pretty well documented as well. You can browse youtube for Georgian soldier’s phone videos to make opinion.
By supporting ethnic separatism in Georgia, Russia undermines its own security and advances the cause of ethnic separatism throughout the Caucasus.