I think as a born-in you get used to "spinning" the truth so that it fits your idea of reality. For example, people saying how they are really trying to live a simple, non-materialistic life as if it was their "option" when in reality they can't find better jobs because of lack of education and are barely making ends meet. I agree with everyone, that they believe their own lies so they don't see it as being dishonest.
Another example: Xmas is so commercial (something alot of people complain about) so I'm so progressive about not celebrating- you get used to "normalizing" crazy ideas. I think someone else mentioned always justifying crazy behavior. I think born-ins are adept at making things look good/sound less crazy then they actually are.
I'm sure deep down we all knew we weren't fooling anyone.