I think you have your chronology all wrong too. Do you understand that the United States set the precedent by changing the rules about 'forcibly changing boarders' by its intervention and occupation of Kosovo?
Before the US pulled their crap in Kosovo, what the US did was considered illegal by international law. After the US pulled its crap, international law was pretty much torn up and thrown away. That rule was now null and void. Any country should be allowed to invade and change the boarders of any other country now that the US has changed that rule.
Russian intervention in Georgia happened after the US changed the rules. Once the rule is changed, the US has no right to gripe when another country takes advantage of the rule change. It was the United States that first changed the rules and set the precedent. Before they can gripe about some other country doing the exact same thing they did, the US needs to make amends for its own sins and not worry about what stupid crap other countries are pulling because of the stupid precedent it set.
Remember, Kosovo was the precedent. The US opened that can of worms. You can ignore the concept of "precedent" all you want. I can assure you that the rest of the world isn't. If Russia had set the precedent, then it would be "Blame Russia First", but it didn't. The United States did.
Consistency counts.
It's important that we be honest. Bill Clinton's actions in Kosovo abrogated the Treaty of Westphalia -- which had governed the state of national borders since 1648.
Of course, in its own way, so did the occupation of the Sudetenland...
What a crapload. Just why, exactly, have countries been invading each other for the last 2000+ years?