"I may not agree with what you say but I will defend to the death your right to say it"
Glad you didn't misattribute the quote...
Let me ask you.... If I wanted to say that
your mother fucks the devil in hell would you defend my right to say it with your life?
Substitute another quote from the Exorcist if you like or come up with something really really offensive... would you defend my right to say it with yout life?
Its one of those quotes that sounds cool in the abstract that is really nothing more than a load of bullshit. The fact is that people say dumbass things all the time and we should not encourage them to do so by defending their stupidity.
have a nice day