The problem of Kosovo is not the same as the partion, poltically and ethnically of Bosnia. What is your point about Britain killing Iraqis? Serbian agression has a lot to answer for, whether people protested against it or not. Fetishising Serbs killed at the hands Nasir Oric is not going to change minds on that score.
Estimates on the numbers of deaths vary widely from 25,000 to 100,000. Personally I have mixed feelingd about the war. I agree that lies were told to justify it e.g. "No doubt that Iraq has WMD" etc. and that the true motive from the US point of view was oil, with the entirely-unrelated 911 being invoked to justify an invasion when the terrorism in Iraq is actually a result rather than a cause of the invasion. 81% in this country opposed the war.
... this is however completely normal and hardly open to criticism as it was the time when the concept of individual criminal responsibility for war crimes, crimes against humanity and genocide was literally being pushed out of the womb so they were struggling with the problems it brings. at that point there were no ready solutions - that's why i think that's its actually irrelevant which country advocated this collective punishment approach as those were the times when they were trying to come up with a solution and lots of ideas, including insane ones, were proposed just to end the agony of finding the solution. it should be regarded as infant disease.