People keep quoting the IAGS as some kind of authority, yet only 129 of their members voted on that particular resolution, out of approximately 500, so less than a third.
More importantly, there don’t seem to be any strict academic or professional prerequisites to become a “genocide scholar”.
According to their own website, “IAGS members are academic scholars, human rights activists, students, museum and memorial professionals, policymakers, educators, anthropologists, independent scholars, sociologists, artists, political scientists, economists, historians, international law scholars, psychologists, and literature and film scholars.”