Be certain: Denuding the word "genocide" of meaning so that Jews couldn't claim a unique claim to the Holocaust has been the work of the past 8 decades.
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Raphael Lemkin did not fight for the legal term "genocide" to provide a "unique claim", & his initial definition was whittled down by other states in part under the claim that the Nuremberg verdicts (done *without* the term genocide) were sufficient. Other nations in the 40s tightened its range out of concern that too broad a definition would see them culpable for similar.
I recommend Lemkin's biography & 1940s articles for a clearer understanding of the term & its history.