Motives matter too. Bombing of Serbia was to stop a bellicose regime and the humanitarian crisis it was creating. It was like bombing Russia right now, which I'd support fully hearted, if it was a possibility.
It was not. Serbia was establishing order within its territory when NATO bombed it without any approval from the UN, basically doing something just because they could. Remind you of anyone?
Saying that Serbia was establishing order within its territory is a bit cynical take. What they did is that they systematically[1] cleansed villages and settlements in order to decrease the percentage of Albanian population in Kosovo.
In a way, they were implementing a century old policy of a guy named Vaso Cubrilovic who argued that Albanians should be expelled[2] from the lands Serbia (precursor of Yugoslavia) took in 1913.
What NATO did, is stopping exactly this from happening.
It's not cynical, it's exactly what was happening. It was the police that was cracking down on terrorists, not army. Army only became involved with NATO involment. And before you say that Albanian guerilla organizations were not terrorist, the US state department classified them that way up to less than one year before the bombing happened.
And as for that supposed policy of Albanian expulsion, by how much did the percentage of Albanians diminish during the Serbian rule of Kosovo? And by how much did the number of Serbs diminish during the Albanian rule of Kosovo?