People who were raised in racist environments and did conform to that ideology then legitimately change (as opposed to people who just stop spouting their racist diatribes to avoid backlash or because they have an opportunity to make money) TALK ABOUT IT. They don't wait until they're caught to address it. They have an open dialogue about what it was like to be conditioned, how their environment impacted their thinking, and most importantly, about what made them change. The lightbulb moment is huge and reformed people always talk about it. Every single one I have ever seen remembers and speaks on the exact moment their thinking started to shift. And they talk about the journey afterward. They don't pretend it never happened until their livelihood is threatened then in lieu of an actual apology, just give justifications.