If you're worried about the Serbs and their friends, well all I can say at this point is have fun with that. The war over Kosovo has already been fought and decisively lost by Serbia, and regardless of whatever noises come out of Belgrade, they know it.
It'll remain a talking point for the Serbian Radicals until they find something else with which to try and whip their supporters into a frenzy over - my money's on the Vojvodina Hungarians.
Iraq lost a war in 1991 and still manages to make trouble for us today. Germany lost a war in 1918 and managed to make quite a bit of trouble by 1939.
So your logic seems thin when you opine that by losing one war that the Serbs are suddenly harmless playthings who can have cities taken from them at our whim.
Moreover, your reason ("stability") for wanting to further break up Serbia makes little sense.
And none of your arguments offer anything for the U.S.
All that you would accomplish is Chirac's plan to break up NATO by causing grave divisions (e.g. between Greece and France, or between NATO and Russia) over a city that no one wants to so much as vacation in (Kosovo).
That's not good enough.
Right now Chirac is calling for the EU arms embargo against China to be lifted in the next 28 days. The timing is not accidental.
France is manuevering for a global realignment of the major powers. A fractious war over a useless city in the Balkans would only serve to further this Talyrand-itous by straining NATO.
Yet you are cheerleading for this very thing.