There is a myth that the Freedom of Speech is an absolute right in the US because of the First amendment to the US Constitution. The fact is that Freedom of Speech comes with limits. Here is an excellent article on the subject:
Notice how many points here contradict the " Freedom of Speech " argument for the Anti-Islamic movie slandering Holy Prophet Muhammad (PBUH).
Education for Freedom Lesson 4
Limits of Freedom of Speech
Does the First Amendment mean anyone can say anything at any time? No.
The Supreme Court has rejected an interpretation of speech without limits.
Because the First Amendment has such strong language, we begin with the presumption that speech is protected.
Over the years, the courts have decided that a few other public interests for example, national security, justice or personal safety override freedom of speech. There are no simple rules for determining when speech should be limited, but there are some general tests that help.
Clear and Present Danger
Will this act of speech create a dangerous situation? The First Amendment does not protect statements that are uttered to provoke violence or incite illegal action.
Justice Holmes, speaking for
the unanimous Supreme Court, stated, The question in every case is whether the words used are used in such circumstances and are of such a nature as to create a clear and present danger that they will bring about the substantive evils that Congress has a right to prevent.