Moreover the US military is stretched to the max now and Europeans wouldn't lift a finger to help albunny kosovars; you could eliminate 90% of European crime by bombing Kosovo (the albunny parts of it) and the whole world knows it. Russia is well poised to call any sort of a Jorge/Condoloser Rice bluff in this one.
And if the US gets bogged down in Kosovo, there are any number of players willing to take advantage of the ensuing chaos. China could go after Taiwan. Iran could go after Israel.