It isn't surprising that Russia should enter South Ossetia in the Georgia Republic and show the world its true face. This recent move is only another blurb in a long line of aggression and threats. You can get a good overview of the current conflict on Wikipedia. And a list of Russian actions since April, 2008 can be found here. These sources are probably biased, so read with that in mind.
Please don't depend solely on sound bites, news and talk shows to form your opinion about the Russian invasion. Do some research first.