Earlier quoted context omitted.
Popular speech doesn't need defending. If you don't believe in the freedom of "unquestionably wrong" speech, then you don't believe in freedom of speech.
This is the same premise style argument in reverse. Save one child and such. Disagree with one part and your completely against. My statement is that freedom of any kind including speech is not black and white.
You're suggesting that there's an absolute concept such as "wrong" speech, and that you're somehow capable of defining and legislating that.