After the Nazis took power they not only burned books, but also introduced the concept of ‘entartete Kunst’ (degenerate Art - great website covering this topic). This kind of art was of course ungerman, unpatriotic, sick and almost an act of treason.
So I always shake my head in disbelief, when I hear American pundits screaming about unpatriotic and unamerican art. But the same applies to other cultures as well. Anyone remember the fatwa against Salman Rushdie?
Art and self expression still have great power - that is why clerics and politicians still fear them and suppress artists (and ideas), which can endanger their ‘pure’ path of domination.
Diversity of opinions, races and ideas is still facing an uphill battle - but it’s unstoppable and that is why the control freaks are so desperate.