I don't know much about Ann Coulter, but you make a good point about a liberal still being allowed to speak in a similar situation. That said, I'm not sure I like a lot of Fox News commentators' methods of expression, but I do agree with them in essentials (Glenn Beck, for example, makes good points, but he can get pretty intense sometimes), so chances are I'd be more sympathetic with Ms. Coulter than the average bear.
Also, the concept of "hate speech" is a terrible one. I'm not sure about you guys up there, but the First Amendment down here means we should be able to speak out against (or for) anything or anyone we want. Of course, in today's age of being paralyzed for fear of offending someone or a group of someones, the idea of Freedom of Speech and Press also seems to be under attack.