As Smiley elegantly quoted, free speech, if not held up in principle, cannot be held up in practice. When people are in charge of what can be said, no democracy can thrive. Governed by their megalomania, a rabid constituency, or a misguided sense of right and wrong, leaders will all too often sacrifice a principle for a political gain. This is why we have a Constitution that forbids the limitation of speech in any way. Otherwise, you'd have people banning words left and right because they make them feel sick (?!).
Not that it's entirely relevant, but I'm Jewish too. So some idiot says kike...okay? He's an anti-Semitic shithead who has his own issues to work out. Or maybe he's just trying to piss off the ass-clenchers. Either way, I couldn't care less. It doesn't affect me. The only people it does affect are the "easily offended", those wonderful individuals who are so indifferent toward all the REAL problems in the world that they decide "saying mean things" is the thing they're going to get REALLY bothered about: "Concentration of wealth? Factory farming? War? Who gives a shit! That guy said chink, we gotta act now!"