Absolute freedom of speech is critical to a proper functioning society.
The good, the bad, and the ugly should all be put on the table to be criticized, argued, partitioned as needed, and offered for individuals to make their personal judgements on what is right for them.
No ideas, concepts, or opinions should be banned. The illogical, idiotic, immoral, or otherwise poor statements and beliefs should face the judgements of others. If they have merit, they will be accepted. If not, they will be criticized and rejected by the majority of the public.
Venues for free speech will serve to educate the less informed.