Where does that line of reasoning come from? Because I doubt it.
Kostunica just chooses NOT to forget that NATO bombed Serbia for 78 straight days. And of all the criticism Kostunica has gotten over the years, and there has been a lot of criticism of him, no one really questions his sincerity.
He promised the relatives of the missing and kidnapped Kosovo Serbs that he would not release the Albanian/KLA prisoners in Serbia's jails until Serbia was able to receive the bodies of their dead relatives or recover any alive. Then the next week with no progress on that front he released thousands of captured KLA/Albanian criminals.
The guy's a liar. Serbs who believe in him at this point are fools.