They are subjective, not objective. Emotionally immature people assess situations in a subjective way, not objectively. They don’t do much dispassionate analysis. When they interpret situations, how they are feeling is more important than what is actually happening. What is true doesn’t matter nearly as much as what feels true. Trying to get a subjectively-oriented person to be objective about anything is an exercise in futility. Facts, logic, history — all fall on deaf ears where the emotionally immature are concerned.
Gibson, Lindsay C. Adult Children of Emotionally Immature Parents. Tantor Audio, 2016. ch. 3, 11:38 – 12:18