I don’t think that’s true, at least for book burnings more generally. Ignoring such acts lends them power, and implies that it is acceptable, and leaves open the possibility of further burnings. To burn a book is a profoundly anti-intellectual action, regardless of one’s set of justifications, and regardless of the content of what one is burning. To allow such acts to continue unchallenged is to allow a festering wound to poison the bloodstream of a society.