The act of burning books wasn’t held by individuals, it was held nationally as a campaign in Germany. I believe that most of the people who participated in this campaign were more likely to be brainwashed by the Nazi governement. Beginning on May 10, 1933, Nazi-dominated sutdent groups carried out public burnings of books they claimed were “un-german”. The books that were being burnt are mostly the foreign literature, especially jewishes. This was to purify the german literature and was a similar as holocaust as German tried to sweep out all the jewish in their country and whole across the purify there race and country.
Certain types of books can give a threat to certain governments as when the time before our digital age that we all can individually access information with our mobile devices the time back then the books was the only option for the people to gain knowledge. For dictatorships, governments keeping people away from knowledge makes them easier to rule over them because the people don’t know what is happening. Furthermore, books that are criticizing against the government ideology is very dangerous for the government as people could question themselves whether this ideology is correct or not.