So was the Holocaust, according to some people.
Is it your best argument? Your "logic":
1. During WWII German Nazis did massacre Jews.
2. Some people deny that German Nazis massacred Jews.
3. Conclusion - when there is a claim that one group of people massacred another and when some deny that it took place, then the claim MUST BE TRUE.
What a weird type of "thinking". But it is very common.
Either way the PC/NWO/EU types will not rest until Serbs will admit that they are guilty of huge genocides, that 4 and 4 equals 5 and until they love Big Brother. This is an experiment in preparing future for everybody.
Everyone knows that the Holocaust happened. Even the deniers know they are lying. Not to mention that 6 million were killed in the Holocaust and "only" a few thousand at sebrenica, if the massacre happened at all.