>If people are afraid to speak their mind due to murderous vigilantes,

then law enforcement has failed, not freedom of speech. its illegal to be a murderous thug, so if there are murderous thugs running around threatening people they should be dealt with within the existing law.

I'm not even sure what your argument is - we should enact laws protecting free speech from these murderous thugs? as if those laws would somehow deter them more than the laws against murder?