Rules about acceptable speech have, over the past three decades, become increasingly significant forms of social regulation. From bans on hate speech to the policing of offensive language, the management of how people talk to each other has become an important means of supervising social relations and establishing moral boundaries. The fact that codes of speech are enforced in this way has led many to push back against them.

This is not simply a case of left vs. right or liberals vs. conservatives. Certainly, political correctness has come to be associated with the left, and many liberals have come to view the appropriate use of language as key to social change. But many conservatives are equally censorious and keen to use speech codes as a way of regulating social relations.

In this struggle over speech, those who protest against restrictions are often characterized as bigots who want the freedom to use racist, misogynistic or homophobic language. But many free speech campaigners, myself included, view the right to freedom of expression as central to the struggle against bigotry. And then there are those who feel marginalized and voiceless, and express their estrangement from mainstream institutions by rejecting what they see as the liberal consensus.

Few of the 350 million people who watch “Top Gear” across the globe, or the almost one million who have signed the petition for Mr. Clarkson’s reinstatement, are likely to be either bigots or free speech advocates. But many chafe at the imposition of rules about what is culturally appropriate. That may explain how a show with a very English kind of puerile humor has gained a global audience.

What should be unsettling is not so much Mr. Clarkson’s transgressions as the fact that a multimillionaire who counts Britain’s prime minister among his close friends should be seen as an outsider or rebel. It is a sad reflection on the contemporary world that rebelliousness has, for so many, been reduced to racist slurs and schoolboy pranks.

Equally sad is that so many others should expend such energy and rage railing at Mr. Clarkson. A Guardian editorial likened him to an “ogre.” The “Top Gear” presenter may be a jerk, certainly; but an ogre?

In the left-leaning magazine The New Statesman, one feminist critic wrote that “if every signatory to this petition were boiled down for biofuel, the world would be a cleaner, smarter place.” There is sufficient blind contempt there to suggest a promising future as a “Top Gear” scriptwriter.

The task of challenging bigotry has been diminished to the policing of language. The task of challenging conformism has been reduced to infantile jokes. It’s not just “Top Gear” that these days seems adolescent.