What Mill got wrong was that as described, "free speech" is exploitable by fascists for authoritarian ends.
Unfortunately, free speech is exploitable by any group for any ends. You
could just as easily substitute "communists," "socialists," "theocrats," and several other groups there in place of "fascists" and it is still correct.
"anarchists for anarchy" would also fit.
I see free speech as a two-way street. The listener doesn't have to listen and, if they do, they need to use their brains to filter out the garbage.
... "Television! Teacher, Mother, Secret Lover..." - Homer
--- MultiMail/DOS
* Origin: Project Scorpio TEST (21:1/175.6)