cognitive dissonance

When Armistice Day and Remembrance Day Turned into War Day

Cognitive dissonance in Psychology
The psychological tension that occurs when one holds mutually exclusive beliefs or attitudes and that often motivates people to modify their thoughts or behaviors in order to reduce the tension.
Anxiety that results from simultaneously holding contradictory or incompatible attitudes, beliefs, or the like, as when one likes a person but disapproves of one of his or her habits.
Motivated Ignorance in Politics