In the abstract, skepticism is justified, but there is a particular reason that so many on the right simply choose not to believe this new story: if this is who Donald Trump really is, then they would have to (again) confront the choices they have made.
https://mailchi.mp/thebulwark/losers-and-suckers?e=2287cc9f94

But this story is awkward, because it dramatically raises the ante. It causes a stirring in the place where their consciences have been hibernating.

What if it is true that the Commander-In-Chief, who is seeking another four years in office, is a small, vicious, and despicable man, who dishonors everything he touches?

So, better to cling to doubt. Better not believe. Even if they know it is true.