text: why do we have the freedom of speech if we have to watch what we say?   freedom of speech is the right to freely express opinions.  the use of profanity, racial slurs, or trying to stir up rebellion, such as "we should kill all..." whatever group, or "assassinate the president" are not expressions of opinion.    the use of name calling and profanity are expressions of anger and speech that incites rebellion is a call to action that threatens national security or the security of the people.  these forms of speech are not protected.