During the 1995 Srebrenica massacre, Bosnian Serb fighters took roughly 8,000 Bosnian Muslim men and boys to predetermined sites before killing them and throwing their bodies into mass graves. In a vast landscape of murder that, as the judges acknowledged, included horrors like the systematic torture, rape and beatings of Bosnians in detention camps and the expulsion of thousands of non-Serbs, this episode alone appeared sufficiently genocidal to the judges. Only there did the perpetrators explicitly display the dolus specialis, or specific intent, “to destroy, in whole or in part, the group as such” required for a killing to be considered an instance of genocide. Killings elsewhere in Bosnia may have been war crimes or crimes against humanity — acts that were equally grave — but the decision argued that wherever there were any other plausible reasons for why the killings took place, the court could not rule that genocide definitively occurred. In a dissenting opinion, Judge Awn Shawkat Al-Khasawneh of Jordan chastised his colleagues for failing to appreciate the “definitional complexity” of genocide by interpreting the intent requirement so narrowly...Ever since the Polish lawyer Raphael Lemkin coined the word in 1944, by combining the Greek word genos, meaning “race or tribe,” with the Latin cide, or “killing,” it has been pulled taut between languages — Greek and Latin, legal and moral...After years of contentious deliberation and diplomatic negotiation, the [United Nations] convention limited genocide to five categories of acts: killing members of a group; causing group members serious bodily or mental harm; imposing measures intended to prevent births within the group; forcibly transferring children from one group to another; and “deliberately inflicting on the group conditions of life calculated to bring about its physical destruction in whole or in part.” Each one of these acts could constitute genocide only if and when committed with the specific intent to destroy a protected group...To invoke “genocide” is to immediately conjure up the memory of the destruction of the Jewish people and its associated architecture of murder: concentration camps and deportation trains, ghettos and gas chambers. This relation has at once augmented genocide’s moral force and undermined its legal uses. The Holocaust is viewed both as the awful standard against which all modern atrocities must be measured and as a supposedly unrepeatable catastrophe to which they must never be compared. The Genocide Convention effectively enshrined this paradoxical understanding of the Shoah and established a nearly impossible bar for genocidal intent based on its example. As a result, international courts have rarely recognized more recent mass killings as instances of the crime, and peoples seeking to have their suffering recognized as such have been bitterly disappointed...Not long after it was adopted, genocide allegations began to flood diplomatic channels. In 1951, the American Civil Rights Congress presented a paper titled “We Charge Genocide” to the United Nations, arguing that the United States was indeed guilty of genocidal actions against African Americans...The strict legal interpretation of genocide has meant that courts might never recognize many of the worst atrocities of the past several decades as genocide. These include but are not limited to the killing of some 300,000 people in the Darfur region of Sudan, the murder of more than a million during the Nigeria-Biafra war, the Iraqi government’s mass deportation and killing of an estimated 100,000 Kurds in the late 1980s and the Yazidi massacres by ISIS in 2014. If Lemkin were alive today, he would most likely recognize the Chinese effort to indefinitely detain, re-educate, imprison and torture Uyghurs, and to destroy their mosques, confiscate their literature and ban their language in schools, as precisely the kind of cultural and physical genocide that he hoped his convention would eliminate. While China is a party to the Genocide Convention, it has refused — like the United States, France and Russia — to recognize the jurisdiction of the I.C.J., shielding itself from the court’s authority...Yet in its remarkable parsimony, the 2007 ruling also reinforced the status of “genocide” as a somewhat inscrutable and unimaginable crime, underscoring the gravity of the offense while establishing such a high bar for genocidal intent that it would become virtually impossible to hold states responsible. It effectively meant that unthinkable atrocities could fail to satisfy the convention’s requirements if they were not accompanied by an overt statement of intent to wipe out an entire people, such as the written plan for a “final solution” that the Nazis adopted at the 1942 Wannsee Conference...
I'll stop excerpting from The New York Times article here out of professional courtesy, preferring to send readers to the original, which I want to have linked here for future reference. And I'll close the comments because the answer won't come from our Comments section. What I want is for everyone to recognize the complexity of the term and the problems with its application to the real world.