Persons A and B are allowed to conduct their transaction, just not on a particular platform. Put an ad in “dumb racist old books” magazine and find someone to buy your book.
How about instead you restrict your book buying to a specialty “woke only” bookstore that carefully curates a selection guaranteed not to offend your delicate sensibilities?
If you want to live a life of restrictions you are more than free to do so. What you may not do is impose them on others.
If you want to live a life of restrictions you are more than free to do so. What you may not do is impose them on others.