You have to know there is a difference between a private company not selling a bigoted book, and a government banning all books which criticize it
This is not fighting corporations, this is getting bogged down in culture wars
And the term censorship is broad, and isn't specific to private entities versus government. Just because we don't have a Soviet-style government (good), doesn't mean that automatically everything is free and open. If I buy out all of a particular work of art and burn it in a bonfire, I've committed censorship. If not illegal, it should at least elicit some moral eyebrow-raising, no?