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Freedom of speech is not just a special and distinctive emblem of Western culture that might be generously abridged or qualified as a measure of respect for other cultures that reject it, the way a crescent or menorah might be added to a Christian religious display. Free speech is a condition of legitimate government. Laws and policies are not legitimate unless they have been adopted through a democratic process, and a process is not democratic if government has prevented anyone from expressing his convictions about what those laws and policies should be.
Ridicule is a distinct kind of expression; its substance cannot be repackaged in a less offensive rhetorical form without expressing something very different from what was intended. That is why cartoons and other forms of ridicule have for centuries, even when illegal, been among the most important weapons of both noble and wicked political movements.

So in a democracy no one, however powerful or impotent, can have a right not to be insulted or offended. That principle is of particular importance in a nation that strives for racial and ethnic fairness. If weak or unpopular minorities wish to be protected from economic or legal discrimination by law—if they wish laws enacted that prohibit discrimination against them in employment, for instance—then they must be willing to tolerate whatever insults or ridicule people who oppose such legislation wish to offer to their fellow voters, because only a community that permits such insult as part of public debate may legitimately adopt such laws. If we expect bigots to accept the verdict of the majority once the majority has spoken, then we must permit them to express their bigotry in the process whose verdict we ask them to accept.

Ronald Dworkin