Brazil Launches AI Platform to Prosecute Authors of Posts Considered Anti-Lgbt

Other than direct calls for violence (which in a book, really doesn't work that way, since any call to violence would be indirect in a sense), yes, you can publish anything. Any viewpoint at least. You cannot publish certain pornographic pictures (children, bestiality), but you are allowed to publish a book embracing both. Similarly, you are allowed to advocate for the violent overthrow of the American government. It is certainly legal, and many books have been published doing exactly this. I can't imagine anyone wanting to stop it; that's dumb.

I mean, here's a book that not only advocated for the violent overthrow of the US government but gave explicit instructions on how to do it: https://en.wikipedia.org/wiki/The_Anarchist_Cookbook

It is legal (and easily available in the United States), but not legal in many countries, which is dumb. While the FBI investigated the author and the book itself, they concluded that it falls well under the 1st amendment rights of Americans. Again, and I'm not sure how many times I need to point this out, America is really the only free country in the world.