David Cole in the NY Review of Books:
People who oppose the protection of racist speech make several arguments, all ultimately resting on a claim that speech rights conflict with equality, and that equality should prevail in the balance.* They contend that the “marketplace of ideas” assumes a mythical level playing field. If some speakers drown out or silence others, the marketplace cannot function in the interests of all. They argue that the history of mob and state violence targeting African-Americans makes racist speech directed at them especially indefensible. Tolerating such speech reinforces harms that this nation has done to African-Americans from slavery through Jim Crow to today’s de facto segregation, implicit bias, and structural discrimination. And still others argue that while it might have made sense to tolerate Nazis marching in Skokie in 1978, now, when white supremacists have a friend in the president himself, the power and influence they wield justify a different approach.
There is truth in each of these propositions. The United States is a profoundly unequal society. Our nation’s historical mistreatment of African-Americans has been shameful and the scourge of racism persists to this day. Racist speech causes real harm. It can inspire violence and intimidate people from freely exercising their own rights. There is no doubt that Donald Trump’s appeals to white resentment and his reluctance to condemn white supremacists after Charlottesville have emboldened many racists. But at least in the public arena, none of these unfortunate truths supports authorizing the state to suppress speech that advocates ideas antithetical to egalitarian values.