What you just described is the biggest damage done by the '99 bombing. I dare to say larger than any material damage. That's the thing that pushed Serbs on the other side of the "west/east dichotomy" and any kind of marketing campaign will hardly paint Western countries as friends or allies. That's valuable ammunition put into hands of local populists. Not that some European leaders mind them ruling Serbia. Would you believe that there is a considerable number of people not willing to get vaccinated by Pfizer or Astra Zeneca Covid vaccines because "those people first bombed us, they're trying to poison us now"?