Naivete n. : Native simplicity; unaffected plainness or ingenuousness; artlessness.

Example:
Is it wishful thinking or sheer stupidity? Democrats Naivete is a bottomless pit?

Taxonomy
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Defination from the web:
naïveté from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Etymology: French naïveté, from Old French, inborn character, from naif. Date: 1673. 1 : a naive remark or action. 2 : the quality or state of being naive ...