MSNBC’s Andrea Mitchell on Wednesday used the very loaded term of "denier" to deride global warming skeptics. Talking to liberal host Rachel Maddow, she referenced Sarah Palin’s opposition to the Copenhagen climate conference and chided, "Her Facebook entry says, you know, ‘Mr. President, boycott Copenhagen.’ How do you rationalize the deniers and the impact that they are having?" [Audio available here.] "Deniers" is a word that climate skeptics find quite offensive, as many liberals equate not believing in man-made global warming to denying that the Holocaust occurred. (In January of 2007, CBS reporter Scott Pelley famously compared, "If I do...