When bigots speak, their words have purpose. They intentionally choose phrases that inflame, denigrate, and marginalize other races, religions, or nationalities. They employ distortions and stereotypes to bolster false arguments. Which brings us to Newt Gingrich, who in an interview last week derided “an invented Palestinian people.’’ His comments were a calculated - but demonstrably false - slander, designed to curry favor with a constituency for which he cares by insulting one for which he does not.