No one at DU ever asks themselves, "from what do we have to hide?' or "why must be build this wall of isolation?". Another one would be, "why is our ideology so fragile it cannot permit participation of those who are of a bit different train of thought?"
DU members never wonder why every left-leaning "community" has a forum for their mentally disturbed to talk among themselves about their anti-psychotic medications. DU'ers never question why every position they hold on any given subject is the opposite position of decent normal people.
So many questions they need to ask, but none have the courage or the intellectual curiosity or the honest personal character.