First, read this article. Then this blog post. Then this one. Then this one and this one and this one. And finish with this one, which I'll quote as it is so good.
I do not want to live in a society that bans books, imprisons journalists, persecutes writers and closes down newspapers. In that sense I am a free speech militant. However, we should notice something here. The writers trying to weasel their way to acceptability tell lies and seek to suppress truth. They are the book burners and the censors in the making, using 'intellectual freedom' as a cover. To support free speech is not a neutral act, it is to be a partisan for truth. Above all, it is to be a partisan for humanist values.Previous: Cuban books in search of a library, Friends of Cuban Libraries
Partisans do not meekly surrender to lies. Partisans do not wallow in the fake neutrality of 'balance'. That is cowardice. Partisans contest, challenge and ridicule. They may not ban it, but they treat nonsense with contempt. They refuse to legitimate the vile filth of murderous prejudice, rooted in lies and dripping with irrational hatred. And they most certainly do not allow public institutions to host rabid nonsense in the name of 'free speech'.