In case anyone thinks this isn’t technically Holocaust denial:
“Members of the German Student Union, organized by the Nazi Party, parade in front of the institute (6 May 1933)”
On 6 May 1933, while Hirschfeld was in Ascona, Switzerland, the Deutsche Studentenschaft made an organised attack on the Institute of Sex Research.
“German students and Nazi SA members plunder the library of Magnus Hirschfeld, director of the institute.”
Four days later, the institute's remaining library and archives were publicly hauled out and burned in the streets of the Opernplatz by members of SA alongside the students. A bronze bust of Hirschfeld, taken from the institute, was placed on top of the bonfire. One estimate says that between 12,000 to 20,000 books and journals, and even larger number of images and sex subjects, were destroyed. Another estimate says that about 25,000 books were destroyed.
“Nazi Party members at the Opernplatz book burning in Berlin”
All text and images retrieved from the Wikipedia articles linked above.