The most famous forms of Holocaust denial and revisionism tend to focus on Jews, casting doubt, for example, on how many were exterminated in the camps. But denying the impact the Nazis had on the other groups they targeted, including queer and trans people, disabled people and Romani people, is still Holocaust denial. Maybe someone should tell J.K. Rowling.
Despite your argument’s insistence to the contrary nowhere in my argument do I accuse Rowling of being anything. Whether or not Rowling is ignorant is irrelevant. Her actions are what matter. When presented with new information about the Holocaust her response was not to become more informed, but to deny the information. That is Holocaust denial and it is harmful. edit: typos