This is from an old story about a publisher backing off from publishing a book after having made an initial contract with the author, because of some of the latter's controversial views. Chris Hitchens debated this on Charlie Rose. Towards the end Hitchens makes this statement..
" I dont want to cloak myself in the mantle of Voltaire, but it seems to me a perfectly simple point that it is not ..... upon me to defend anything Irving says or hypothesizes in order for me to defend, not his right to say it so much as my right to read it....".
Could someone explain how Voltaire is related to this view?? Also what is such a use of language called, allegory?