Free speech is like pregnancy--you either are or you aren't. No middle ground.

Some times free speech is destroyed by a "positive" goal--slamming the door on anyone who denies the Holocaust, for example. It includes such disparate people as those who deny anything happened, those who say that maybe 3 million, not 6 million Jews perished, and even those who try to include the tens of millions of others who died at the hands of Nazi Germany (see Prof Norman Davies who was denied tenure at Stanford for having the temerity to open up discussion to this possibility.)