Hate Speech

What on earth can Georgina Beyer and her ilk have in mind with hate speech laws. There are already quite strict laws on making threats, inciting to riot, sedition, libel, slander, defamation and perjury. That pretty much covers the possible range of injury that you can do to a person or to the state by speech alone. Is there some heretofore undiscovered right not get one's feelings hurt (poor thing) or to avoid comment on one's actions, opinions or life style (watch out, that works two ways), or is it just to shut up people whose opinions they don't like.