Internalized logical fallacies combined with perceived (or real) trauma along with a lack of critical thinking skills or self awareness required to understand that their thinking is illogical.
The brain is a dumb piece of meat that was shocking into awakening and it is scrambling to make sense of the world and its experiences. It doesn't do a good job if left to its own devices and very often makes mistakes that if not rectified early on can become near impossible to unlearn due to cognitive dissonance.
These lines of thinking have existed for a very long time, becoming louder during the age of information, and all it takes is for someone not in a good headspace to read something that both reaffirms their sorrow as well as shift their personal responsibilities onto another entity. Our brains eat that shit up if not critically analyzed.
So when someone attempts to say that their perceived persecution is wrong or self imposed they become angry feeling invalidated on a personal level.
Oh man this brought me back to when I was happy. I miss being able to make music :,)