"Do you believe in Jesus Christ's divinity?"
"Yes."
"So you believe the bible is the truth?"
"Yes."
"ALL of the Bible, right? Because if some parts aren't true, maybe the the Gospels aren't and therefore Jesus might not have done all the things that were said of him."
"Right."
"In fact, the Bible must be literal truth, right?"
"Yes."
"OK. I have one word for you: dinosaurs."
"Oh fuck."
It's all a matter of connecting yourself to a belief structure and tying yourself to the mast in the face of evidence supporting contrary positions. It's the logic process those use to support Trump no matter what. They cannot accept contrary evidence that might shift their beliefs because their beliefs are all they have to guide them through this life and if they're shaken they have no roadmap, and therefore, no hope.
It’s also important to remember how the dynamics of a cult (which is what MAGAism is) are designed to entrap members. When someone joins—either slowly or all at once—they are not only indoctrinated to reject all evidence contrary to the beliefs of the cult, they are pressured (or outright instructed) to cut off ties with all others that are not true believers (members of the cult). This shrinks their community, and subsequently their perception of their own general value and purpose, to only the collective of zealots and manipulative (and most often abusive and exploitive) leaders.
Often times they are even pressured or instructed to either give all of their wealth to the cult (again, usually to the leaders) or just give it away. This further isolates them
and makes them much more (or entirely) dependent on the cult community for survival, much less prosperity. It also tends to strengthen the hold the cult leadership has on the common members and acolytes, as the leadership often use the wealth to maintain systems of containment and control.
Once more, cults often establish and demonstrate dire (sometimes violent) consequences for leaving, whatever your reason. They make it clear that not only will you never be allowed to return, but they will make you pay for your desertion long after your departure. In some ways, you will
always be a member, whether you like it or not. Till death do you part.
This has the very intentional consequence of making disavowing the cult’s teachings and beliefs not just a matter of changing one’s mind—with all of the psychological difficulty that comes with that process—but also losing the only source of social and financial support you now have, and likely making your life outside of the cult miserable (or unlikely).
Of course, for some within MAGA it is not quite as extreme as joining Heaven’s Gate or Jonestown. But some of these elements are very much present, particularly the radicalisation, shifting indoctrination, social isolation, psychological and financial exploitation (sometimes to an extreme, as we are seeing now), deserter punishment, and definitely leader worship.
For most still in the movement at this point, they have gone all in, committing their mind, body, soul, and worldly possessions. For many, the idea of renouncing their beliefs comes with very real, very undesirable consequences. Their entire sense of self has become entrenched the MAGA world.
It really isn’t that far off of the development of the Nazi social order.
So in addition to what you have said, which is a very real hinderance to efforts to breakdown the MAGA cult and free the minds of the cultists, you also have the structural constraints limiting success.
TL;DR
MAGA is a cult and members experience many of the constraints and dangers inherent to cult membership (and degenerate, megalomaniacal leaders). The cult’s structure and systems of control make it that much harder to help them break free of the ideology.
