Something said in humor, and it was, regardless of how horrible it sounds, isn't hate speech. But even if it were, I'm fully in support of all free speech; the good, the bad, and the ugly (obv. I don't agree someone should be able to yell 'FIRE!' in a theater, or direct threats [that are legitimate threats], or earnestly trying to incite violence or some other serious crime). I hate making a slippery slope argument, but once you start setting limits on what people can say, you open the flood gates.