Book burning isn't really about protesting the content of a book. It's to ensure no one is ever exposed to the ideas at all. Which is why it's usually accompanied by the author being dead, exiled, or ill-intent that author will soon to be dead/exiled.
Criticism and protesting does the opposite. It purposefully draws attention to someone/something, with the intent of that spotlight being as bright and permanent as possible.
In the current season of Lopez, a former gangbanger (a gentle giant on the simple side) who is George's Butler, has gone back to school to get his G.E.D. where upon, half way through reading Huckleberry Finn, asks the room "Is it alright if I just call him Jim?"
My first encounter with Book burning was an episode of Family Ties where conservatives were trying to get Huckleberry Finn out of the School curriculum (and library), because by god it was 1983, and that sort of language is completely unacceptable for children!