Because the claim of genocide of Bosnian Muslim is an attempt to whitewash the only genocide that occured in Bosnia - genocide of Serbs in WWII.
The classic Nazi arsenal of lies is used- the number of Bosnian Muslims civilians was augmented tenfold, the number of Serb civilian victims was diminished tenfold to make macabre equation.
/for mathematically chalenged - the death toll in Bosnian civil war 1992-95 was not 200,000 Bosnian Muslim civilians, it was 102,000 civilians and soldiers on all four sides -Serbs, Croats, pro-government Muslims and anti-government Muslims. The lie of 250,000, although debunked is still used to make the lie of 8000 "Bosnian men and boys massacred in Srebrenica" more believable/.
In WWII, anywhere between 460 000 and one million Serb civilians was murdered by Bosnian and Croatian Nazis.
Show me a person who speaks of genocide of Bosnian Muslims and I will show you a Nazi revisionist.
And this claim was to divert attention from the two main crimes commited during the dissolution of Yugoslavia. The first was the massacre and expulsion of the Serbian Krajina - the centuries old land with its own traditions and sub-culture, the second was still ongoing pogrom of Serbs and Gypsies in Kosovo.
EVERYBODY can see it for himself. Just travel around former Yugoslavia and see who remains and who does not in his place.
Someone posted a link to Serbian military postcards from WWI, and one of them is of Austrians hanging Bosnian Serb civilians - just as was mentioned in Rebecca West's book "Black Lamb and Grey Falcon". She was there before WWII and saw the photos from the Sarajevo police station of this which shocked her. After the assassination of the Austrian Archduke, the Austrians started hanging civilians - peasants - including women, all around Austrian barracks in Bosnia.
"The Austrian Culture in Bosnia" (Serbian peasants hanged by the Austrian Army during World War 1)