If Serbia had been totally honest the question for the ICJ would have been something like: "is it right that a coalition of countries occupies a part of your country and then let it claim independence - in spite of an UN resolution?". But that would have been too insulting for the tender nerves of EU and US diplomats.
Now with the Serbian resolution for the UN General Assembly we see the same dilemma. The resolution says that unilateral secession is not an acceptable way to solve territorial issues. Again the fact that it is a foreign supported secession is not mentioned.
In fact this is the real issue: the Latin-Americanization of the Balkans. The same freedom of action the US has allowed itself in Latin America it applies now also in the Balkans. The destabilizing effect of such actions results then in a chaotic situation that serves as an excuse for yet more intervention. Sure, sometimes they have good intentions and sometimes these work out well, but often not.