Trump is a cult leader in all but name. His zealots support worldviews that have been made illegal, taboo, obsolete, or otherwise unacceptable, like white supremacy and racism, fascism, theocracy, homo-/transphobia, and mysogyny; they perceive this as an attack against their lifestyles by “the others.” They will rally to the loudest voice that speaks out against “the others” and support him as long as that remains true.
Trump cultists are irrational creatures, you can’t apply rational expectations and deduce a satisfactory answer.