Though I agree, I can't help but think of Anwar al-Awlaki [0]--the first US citizen killed by JSOC [1] for what seems to be his expression of anti-US sentiment (and calls for violence against America & Americans). That said, he was a) an American citizen and b) expressing what one might consider his freedom of speech.

Is speech protected only in so far as that we agree with it and that should someone say something we're not comfortable with (e.g., "I hate the US policy in Country X and think the US should be stopped") we should have the right to stop them, or should there be no barriers on it whatsoever?

0 - http://en.wikipedia.org/wiki/Anwar_al-Awlaki

1 - http://en.wikipedia.org/wiki/Joint_Special_Operations_Comman...