What's wrong with bombing Yugoslavia? The bombing campaign cost about 500 lives, but put an end to a decade-long series of wars that had killed 140 000 people and made 4 million refugees. Never seen anyone explain what exactly the grievance is here.
at least part of grievance is from people who were able to murder people they disliked and were forced to stop that
Are you sure that's the reason? NATO bombed the wrong people if you ask me.
Look at the Hashim Thaçi, the commander of the most powerful faction of so called "Kosovo Liberation Army" and then the first prime minister and later the president of Kosovo, who is now under trial:
"On 24 April 2020, the Kosovo Specialist Chambers and Specialist Prosecutor's Office located in The Hague filed a ten-count Indictment for the Court’s consideration, charging Hashim Thaçi, Kadri Veseli and others for crimes against humanity and war crimes, including murder, enforced disappearance of persons, persecution, and torture. The indictment charges the suspects with approximately 100 murders of Kosovo Albanians, Serbs, Roma, and political opponents." [0]
Too bad he seem to get away with trafficing organs of Serbs:
A report to the Council of Europe, written by Dick Marty, issued on 15 December 2010 states that Hacim Thaçi was the leader of the "Drenica Group" in charge of trafficking organs taken from Serbian prisoners. [1]
An EU Report released in 2014 concluded that organ theft and trafficking took place but "on a very limited scale with a few individuals involved".[2]
Many witnesses of KLA crimes were murdered or intimidated.[3]
Here is Thaci posting happy photo of him and "old friend" Joe Biden long after the accusations became public[4]. I find it hard to believe that CIA and other Western agencies were unaware of the nature of gangs NATO was helping.
[0] https://en.wikipedia.org/wiki/Hashim_Tha%C3%A7i#Resignation_...
[1] https://en.wikipedia.org/wiki/Hashim_Tha%C3%A7i#Controversie...
[2] https://en.wikipedia.org/wiki/The_Hunt:_Me_and_the_War_Crimi...
[3] https://en.wikipedia.org/wiki/Kosovo_War_crimes_witness_inti...