Confirmation bias
The psychological process of utilizing self-propaganda can negatively influence values and beliefs, and subsequent perceptions and judgments, thus becoming a self-fulfilling prophecy. Self-propaganda can also be a form of self-deception. Those whose values match the self deceptions are even further impacted. Confirmation bias and cognitive dissonance can cause people to further perpetuate the propaganda, reaffirming or reinforcing their beliefs despite contradicting evidence.