In an ideal world yes, but last I checked freedom of speech protects many heinous beliefs, statements and expressions of those beliefs. Take a case you and I might see around you right now, some of the hate mongering done on anti-Islamic circles is bordering on calling for mass genocide, Anders Breivik fed on this sort of stuff for a very long time, only to give citations to people like Robert Spencer in his book, the work of some of these people led to the deaths of how many people?
Now say what you will, he was a mad man, a one off. But he had a clear involvement within that school of thought, he himself claims that it inspired him. But nowhere do I see the debate of even regulating some of this hateful press, let alone outlaw it.
People get killed everyday, mass murder every fortnight, genocide every leap year. Why is this very specific genocide outlawed in so many nations.
Let#s not kid ourselves, even if it's considered right by some, it's still hypocritical and the same kind of moral standard is rarely applied if ever elsewhere, which tells you clearly that the reason for it does not begin and end with humanity, thus this is something to be questioned again and again.