Was there? It seems like that was the perfect natural experiment then. So what was the outcome? Was there a sudden rash of holocausts the year that publishing started again?
2016 was also first Trump, Brexit, and roughly when the AfD (who are metaphorically wading ankle deep in the waters of legal trouble of this topic) made the transition from "joke party" to "political threat".
Major book publishers have sensitivity readers that evaluate whether or not a book can be "safely" published nowadays. And even historically there have always been at least a few things publishers would refuse to print.
GP said major publishers. There's nothing stopping you from printing out your book and spiral binding it by hand, if that's what it takes to get your ideas into the world. Companies having standards for what they publish isn't censorship.
