The fact is that censorship always defeats its own purpose, for it creates, in the end, the kind of society that is incapable of exercising real discretion.
~Henry Steele Commager
Wherever they burn books they will also, in the end, burn human beings. ~Heinrich Heine, Almansor, 1823
Obscenity is not a quality inherent in a book or picture, but is solely and exclusively a contribution of the reading mind, and hence cannot be defined in terms of the qualities of a book or picture.
If we don't believe in freedom of expression for people we despise, we don't believe in it at all.