Quote from Maverick74:
The First Amendment forbids government from "abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble." Speech that threatens public safety or national security can be curbed, courts have ruled.
In 1942, the Supreme Court sustained the conviction of a Jehovah's witness who addressed a police officer as a "God dammed racketeer" and "a damned facist" (Chaplinksy v. New Hampshire). The Court's opinion in the case stated that there was a category of face-to-face epithets, or "fighting words," that was wholly outside of the protection of the First Amendment: those words "which by their very utterance inflict injury" and which "are no essential part of any exposition of ideas."
Actually, I'll respond a bit more fully. Courts have ruled against speech that poses an imminent threat to public safety. You are quite within your rights to espouse a philosophy that demands an overthrow of the government and the eslavement of every left-handed Mexican, for example.
Also, it's amusing to see that the case you then go on to cite has nothing at all to do with the point you were ostensibly trying to make.