If he were to turn against them, things would very quickly look very differently.
How? People have spent over a decade of their lives, isolating themselves from former friends and family in their worship of the orange rapist. The sunk cost fallacy is here deep.
I appreciate that you're trying to highlight the deeper fundamental problem that could lead to a repeat of this situation even when Trump is gone, but I think you're really underselling just how much of a fucking cult Trump has cultivated, and how immensely idiotic, immoral, and hypocritical his followers are.
Remember that as late the 1950s, a slim majority of Germans still thought positively of Hitler.