The law, if you were wondering
Congress shall make no law… abridging the freedom of speech, or of the press.
— First Amendment, United States ConstitutionThis claim cannot, consistently with the First Amendment, form a basis for the award of damages when the conduct in question is the publication of a caricature.
— Hustler Magazine v. Falwell, 485 U.S. 46 (1988)One man’s vulgarity is another’s lyric.
— Justice Harlan, Cohen v. California, 403 U.S. 15 (1971)A function of free speech under our system of government is to invite dispute. It may indeed best serve its high purpose when it induces a condition of unrest… or even stirs people to anger.
— Justice Douglas, Terminiello v. Chicago, 337 U.S. 1 (1949)Together, these hold that parody and caricature of public figures are protected speech, that vulgar language alone isn’t grounds for punishment, and that speech doesn’t lose protection just because it makes someone angry.
Read the document that guarantees it, straight from the source.
Read the U.S. Constitution