Jonathan Haidt The Righteous Mind: Why Good People Are Divided by Politics and Religion makes a well-reasoned case against reason. It persuades that the power of persuasion is overrated. It opens minds to the near universality of closed minds. Read my review of this provocative book @ The American Conservative.
Savage sums up the findings of this book simply: liberalism is a mental disorder.
And it is.
They are clealy incapable of thinking outside of their box.