Whether a city may selectively prohibit a subset of otherwise proscribable fighting words based on the subjects or ideas they express.
Holding
No. Even assuming the ordinance reaches only fighting words, it is facially unconstitutional because it selectively prohibits speech based on its content and viewpoint.
Reasoning
The Court accepted the Minnesota Supreme Court’s authoritative construction that the ordinance reached only fighting words. It therefore did not decide whether the ordinance was overbroad under the proper scope of the fighting-words doctrine. Instead, the Court assumed that all speech covered by the ordinance could constitutionally be proscribed and asked whether St. Paul could selectively regulate that speech because of the message it conveyed.
The fact that a category of speech is proscribable does not make it wholly invisible to the First Amendment. Government may regulate fighting words because of the features that make them fighting words—an especially intolerable and socially unnecessary mode of expression—but may not use that category as a vehicle for suppressing ideas it disfavors. Just as government may punish obscenity but may not punish only obscenity critical of the government, it may not punish fighting words only when they express particular ideological content.
St. Paul’s ordinance covered fighting words that insulted or provoked violence on the basis of race, color, creed, religion, or gender, while leaving equally abusive fighting words concerning political affiliation, union membership, or homosexuality outside the law. That distinction was based on the content of the message, not on a neutral feature of the manner in which it was communicated.
In practical operation, the ordinance also discriminated by viewpoint. It could permit a speaker to denounce “anti-Catholic bigots” in fighting words while barring a speaker who used fighting words to attack Catholics. St. Paul therefore gave one side of debates about race, religion, and gender greater freedom to employ invective than the other side, which is a form of viewpoint discrimination at the core of the First Amendment’s prohibition.