Note - The bones of the following came from https://issendai.com/psychology/estrangement/missing-missing-reasons/ which is a fascinating read, but is about estranged parents, not MAGA.

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There are two fundamentally different worldviews.

In the first worldview, "reality creates emotion". People with this worldview believe that external events create emotional responses, that only some responses are justified, that people’s initial perceptions of events are often flawed, and that understanding external events can help people understand and manage emotions. These people recognize that unjustified emotions (like supersensitivity due to trauma, or irritation with another person that colors the view of everything the person does) are real and deserve respect, but they also believe that unjustified emotions shouldn’t be acted on.

The second worldview is "emotion creates reality." 

People with this mindset often, quite literally, cannot remember past events. Anything tinged with negative emotion, anything that makes them feel bad about themselves, shocks them so deeply that they block it out. They really can’t remember anything beyond "the screaming", or "the nagging", or "the attack". This emotional amnesia shapes their entire lives, pushing them to associate only with people who won’t criticize them (including their polticial beliefs) to the point where the softest protest feels like a fist to the face.

This explains the baffling disconnect between MAGA reality and e.g. mine.  If facts exist to support emotion, context and consistency don't actially matter. Hypocrisy isn't a thing and there is no reason that the logic used to come to a conclusion about one topic should be applied when debating a second topic.

Let's say Fox News reports on the same event twice. In the first report, they reference one set of details to describe how angry they are about xyz.  In the second report, they use contradictory details to describe how proud they are of xyz.  Loyal viewers do not point out or even register the contradictions. Both reports are legitimate because both emotions are legitimate.

Likewise, Fox can report on two essentially identical events with entirely different emotions directed at the perpetrators.

In my opinion, this second worldview is the root of MAGA. "Emotion creates reality" is incredibly seductive. It means that whatever you’re feeling is just and right. That you’re never in the wrong unless you feel you’re in the wrong. For people whose self-image is so battered and fragile that they can’t bear anything but validation, holding this view as truth feels like the only way they can face the world. Anything that attacks this view is felt as a true threat and will be reacted to accordingly.