You're failing to distinguish between speech and action. If someone wants to argue that we should limit freedom, let them speak. They may be wrong but we can hear them out -- and once their argument is put in the light of day we can deconstruct it and prove why they're wrong, if they are. There is no need to censor idiots; just give them enough rope and they'll hang themselves in front of everyone.
Leaving wrong ideas on display is a necessary part of democracy, because it encourages the refutations to be regularly publicized as well. It requires people to understand why an idea is wrong, rather than merely being told that it is and admonished never to speak of it again.
If you don't allow people who are wrong to be wrong in public, they will continue to be wrong in private where no one is there to correct them.
Leaving wrong ideas on display is a necessary part of democracy, because it encourages the refutations to be regularly publicized as well. It requires people to understand why an idea is wrong, rather than merely being told that it is and admonished never to speak of it again.
If you don't allow people who are wrong to be wrong in public, they will continue to be wrong in private where no one is there to correct them.