Freedom of Speech is the goddamn right to offend
We will prove the contra-positive to be true
"There is no need of any laws concerning Freedom of Speech if there is right to offend"
Suppose you can hurt anybody's feelings , and assume there is no restriction regarding that. So long as you keep your nerves and not physically hurt anybody , you are fine to go ( just assume ). In that case , nobody would really care about what you would say , rather they have right to not take your comments / criticisms. Hence in this case both the critic and the listener protect their own right to hurt and to not get hurt respectively. Hence in this case , there is no requirement to establish any specific laws concerning freedom of speech ; since in order to pursue a legal battle the person would need to prove that somebody else's freedom of speech offends him/her.
This is Freedom of Speech ; this is the right to offend !