The KLA was busy killing dissenting Albanians both before and during NATO's war (and after too). Serbian authorities had compiled and presented detailed info with names and dates. On the contrary, allegations of Serb atrocities have invariably been poor on detail and rich in speculation and reliance on obscure sources, usually traceable to the KLA propaganda machine. Most of the numbers you quoted are from the Soros hrw link. The 463k prewar (and even pre - March 19) displaced was indeed from a UNCHR spokesperson (assuming that the quote of your link is accurate), but it was directly contradicted even by the CIA-infiltrated KVM and never officially promoted, let alone supported by real data. That number is as valid as William Cohen's "100k dead".
I'd be interested in seeing any estimate the KVM made of the total IDPs and refugees from Kosovo and your rationale as to why it would be better than the number of 463,000 established by UNHCR, the Agency actually responsible for refugees.
William Cohen's "100k dead".
Cohen never said "100,000 dead". There's a big hint as to what he actually said in the article's headline: U.S. defense secretary: Up to 100,000 Kosovar men missing
Cohen further said that 4,600 Kosovar men were already believed to have been executed and the 100,000 "may have been murdered". Given the mass graves already spotted, refugee reports, and Slobo's past propensity for using mass murder as a way of adjusting unfavorable ethnic balances, Cohen's statement is reasonable. It is not, however, as you falsely claim, a statement that there are 100,000 dead.