Getting back to Leon's initial post in this thread, I'd ask what's his point ?" ( apart from a bit of casual trolling )
Freedoms of speech and expression are NOT unlimited freedoms, and deviously misrepresenting "freedom of speech" as such is just shoddy disingenuity. Slander, defamation & libel laws , restrictions that prevent people from using "freedom of speech" and "freedom of religious/political expression"/to incite violence or hatred; these are common and widely accepted limits to "freedom of speech and expression".
Discussion and study within Germany of the history of the German Nazi regime is not forbidden, it is allowed and is often part of approved curriculums at German schools and universities. What the German nation is not going to tolerate is any "revisionism" that tries to deny historical truth and fact about the German Nazi regime and in particular, the Holocaust.
Darling Leon, if you choose to assert that the "right to freedom of speech" is unreasonably restricted by sensible limits that prohibit slander, defamation, libel, incitement of violence and hatred, then that is your choice. Just don't expect much support, expect ridicule. That's what such risible nonsense deserves.