Firstly, https://en.wikipedia.org/wiki/Defamation
Secondly, you're okay with someone inciting violence/vandalism/crimes, and people acting explicitly on that person's direction, as long as only the actual violence/vandalism/crime is punished?
Secondly, you're okay with someone inciting violence/vandalism/crimes, and people acting explicitly on that person's direction, as long as only the actual violence/vandalism/crime is punished?
Yes. Everyone has agency, if I tell you to commit a crime it's up to you whether to do so.