Their whole identity, sense of purpose, and feeling of righteousness is wrapped up in it. To face reality would be to admit they were made a fool and acted like a monster based on a lie. Humans would rather die on a foolish hill than feel the pain of guilt and regret.

This is true, but nearly all the examples of people actually admitting responsibility and facing the consequences are religious people. When you realize God is infinitely larger than you, you accept the order of all things. The truth will set you free.