Ex-NPR analyst Juan Williams said Sunday that his firing over a comment about Muslims amounts to "censorship," adding that it was "despicable" for an NPR executive to later suggest he was "unstable."

Williams was fired as a news analyst for the public radio network after saying on Fox News that he gets nervous when he sees passengers in Muslim clothing on a plane. The incident sparked a national controversy over free speech and political correctness.

Williams, who has since joined Fox News as a full-time contributor, said on "Fox News Sunday" that the debate over his treatment by NPR marks an "important moment" in American public life.

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