Neurons that fire together, wire together.
The MAGA mindset is entrenched in worry, hate, cruelty, and now revenge.
It may remain so unless an equal or greater perception changes their mindset. That is not likely in their lifetime unless an extreme distaste or trauma dissuades their thought habits.

It took 20 years for the high culture of Germany to descend into horrific barbarism. With improved messaging and strategy, it could take less time for America to fall into an abyss.