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.
Iirc, one of the most famous pictures of a book burning was right outside that hospital, and the books came from inside it.
Non gender conforming people were the first group they came after.