Surely it simply makes it more clear that a general bonhomie doesn't substitute for actual defences.
Again, I should put my hand firmly up and admit I misunderstood the timeline. It sems from several sources that Georgia moved in first. On the other hand, it looks as if the Russians may have been waiting for it to go ahead, with only 12 hours passing between the Georgians rolling, and the first heavy units rolling through the tunnel.
I don't see it myself, but I concede that maybe this is how Russia felt when NATO rolled against Serbia?