Could 'wokescolding' be effective after all?

A fairly common idea you’ll hear if you’re having a discussion about how to counter peoples’ racist or sexist prejudices is that you definitely shouldn’t call them racist or sexist. Here’s one example, a comment from Alana Conner, executive director of Stanford University’s Social Psychological Answers to Real-World Questions Center:

Telling people they’re racist, sexist, and xenophobic is going to get you exactly nowhere, It’s such a threatening message. One of the things we know from social psychology is when people feel threatened, they can’t change, they can’t listen.

It makes sense - why would anyone question their own views after being told that they’re racist? If I told someone I was sceptical about reparations (which I am, this isn’t a belief I’m subtly trying to call racist) and was immediately met with shouts of ‘racist!’ or ‘bigot!’, my reaction would be to shout back ‘fuck off!’. But part of me thinks that this fails to grasp the actual mechanism by which wokescolding could…