To understand the Trump mindset, just take a look at some of the posts written by Dopers here (and I don’t mean this as a “both sides do it,” but just as a "look at it from their shoes):
Here on this Straight Dope, we’ve had people claim that almost nothing bad about a Democrat could deter them from voting for that (D) candidate against Trump:
My point not being as a “gotcha,” but rather, to illustrate that…that’s exactly how Trump voters feel, just in reverse. Blue-Red tribalism is so intense these days that just about nothing one’s own side does can be so bad as to make Blue jump over to Team Red or vice versa. That’s why Trump voters aren’t abandoning their guy. They’ll stick with him to the bitter end.