What is happening in South Ossetia is a contentious issue. As with most conflicts, there are two sides to the issue. In this case, Russia and Georgia are at odds over a region that originally broke away with Georgia following the fall of the USSR.
But right now, Georgia has the US on their side. They aren't sending troops; they're sending diplomats and the media. And so, whatever Russia's justification, Georgia has the world's sympathy right now, because of the science of speech, propaganda.