The quote, "Sometimes people don't want to hear the truth because they don't want their illusions destroyed" is, at least on the Internet, often attributed to Nietzsche, e.g., goodreads, Simple Reminders, IHeartIntelligence, and all over Pinterest.
However, I cannot find any evidence for the attribution in Complete Works of Friedrich Nietzsche (Delphi Classics) or using Advanced Search on Google Books, with the search parameters, "Find results with all of the words" and "inauthor:Nietzsche" {search results}.
In addition, both QuoteFail and Wikiquotes question the attribution.
Nietzsche did write, "For the historical audit brings so much to light which is false and absurd, violent and inhuman, that the condition of pious illusion falls to pieces." 1
In the same essay he wrote, "... 'he who destroys illusions in himself and others is punished by the ultimate tyrant, Nature.'" 2
As far as I can tell, QuoteFail has it right: "This quote appears to have been created within the Tumblr-verse."
Does anyone know differently?
Footnotes
Nietzsche, Friedrich. "Thoughts Out of Season, Part Two, The Use and Abuse of History. Preface." ("Vom Nutzen und Nachtheil der Historie für das Leben", 1874), Complete Works of Friedrich Nietzsche. Translated by Anthony M. Ludovici and Adrian Collins, Delphi Classics, 2015, Kindle edition, location 9365.
Ibid. at location 9398.