You're right. US Freedom of Speech actually has more legal restrains.
Fighting words are words or phrases that are likely to induce the listener to get in a fight. This previously applied to words like nigger, but with people getting less sensitive to words, this exception is little-used. Restrictions on hate speech have been generally overturned by the courts; such speech cannot be targeted for its content but may be targeted in other ways, if it involves speech beyond the First Amendment's protection like incitement to immediate violence or defamation. (http://en.wikipedia.org/wiki/Freedom_of_speech_in_the_United_States#Types_of_restraints_on_speech)
no subject
Fighting words are words or phrases that are likely to induce the listener to get in a fight. This previously applied to words like nigger, but with people getting less sensitive to words, this exception is little-used. Restrictions on hate speech have been generally overturned by the courts; such speech cannot be targeted for its content but may be targeted in other ways, if it involves speech beyond the First Amendment's protection like incitement to immediate violence or defamation. (http://en.wikipedia.org/wiki/Freedom_of_speech_in_the_United_States#Types_of_restraints_on_speech)