I'm not surprised you as a British citizen think a war alliance bombed some seemingly random country because the alliance felt bad for someone. I bet Tony Blair lied his ass off about Iraq because he wanted to help the Iraqis.
Regarding the topic of NATO bombing the Federal Republic of Yugoslavia because of what the F.R.Y. did in Kosovo....i.e. the ethnic cleansing & bloodshed of Albanians.
There are huge amounts of independent first had witnesses to the atrocities during this war committed by the F.R.Y. The facts are irrefutable in courts of law as has been proven in the decades since.
Iraq is well known as a total disaster as the British were then in Afghanistan wiping out the Taliban. Tony Blair was convinced by his best mate..George W Bush..the POTUS at the time, that is was a good idea to bomb Iraq because of 9/11....So we pulled out of Afghanistan & the Taliban grew in strength & caused problems later on..(now)
Tony Blair should have told G.W.Bush to GTFO....but the UK was still paying off the WWII debt (Marshall plan) to the USA at the time & we were still under the "special friendship"....