On (1), that quote is quite irrelevant to the current discussion, and I don't want to get into that. I'm glad that we all agree that burning books should be condemned.
On (2) and (3), neither of these are true in reality, and most don't think they should be true either.
Even if you are an extremely principled libertarian, I am sure that you don't think that every single thing a "private" entity does is inherently good. We, the "private" citizens, certainly can (and should) criticize their actions.
On (4), as I said in my comment, I very much disagree with the prudish/ideological banning of the book from school libraries, so I guess we agree on that?