https://www.newyorker.com/news/news-desk/copenhagen-speech-v...

"Contrary to what most people think, Germany did have hate-speech laws that were applied quite frequently. The assertion that Nazi propaganda played a significant role in mobilizing anti-Jewish sentiment is irrefutable. But to claim that the Holocaust could have been prevented if only anti-Semitic speech had been banned has little basis in reality. Leading Nazis, including Joseph Goebbels, Theodor Fritsch, and Julius Streicher, were all prosecuted for anti-Semitic speech. And rather than deterring them, the many court cases served as effective public relations machinery for the Nazis, affording them a level of attention that they never would have received in a climate of a free and open debate."