Nietzsche: Sometimes? Or Routinely?

This trait is most common among patriots, anti-intellectuals and Christian fundamentalists.

Although illusion has pragmatic utility,

it is essentially antagonistic to truth.

They don't call 'em "Know Nothings" 

for nothing.

http://en.wikipedia.org/wiki/Know_Nothing

http://history1800s.about.com/od/immigration/a/knownothing01.htm

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"The truth shall set you free."