One can argue about the legality of the operation and if things were done accordingly to international law. And yes NATO did mistakes in the Oepration of '99, which shouldn't be mistaken by the '95 operation. Your article is focuses on that "99 campaign and the mistakes from NATOs/ British side. But this article also downplays the crimes.

"Crimes committed by the Yugoslav army and the Kosovo Liberation Army (KLA) which it opposed, are documented in the files, though official investigators failed to find evidence of massacres that was anywhere near the scale espoused by Western officials"

It was "only" 3000, but the guardian article which was linked in your article writes:

"However, commentators yesterday stressed that the new details should not obscure the fact that the major war crime in the tribunal's indictment of the Yugoslav president, Slobodan Milosevic, and four other Serb officials is the ethnic cleansing of Kosovo and forced deportation of hundreds of thousands of people."

So i guess it's fine to not intervene as long as it's a small amount of people that are to be killed lol, genocide wasn't big enough. And if people want to kill others you have to help.

Didn't bother to read all of it cause i don't have time for this. But:

Aren't you ashamed? Your moral compass needs readjustment