You’re conflating a critical theory model and a general use definition.

Racial groups are not absolute or uniform, members act independently from groups and eachother, rarely does a group act in its entirety. Members of groups do not all receive uniform benefits or disadvantage because of group membership.

KKK member goes to North Africa=no longer racist by your model. No, they’re still able to act and be racist independant of any wider circumstance.

Ironically, critical analysis is not a very well utilised skill among critical thoerists.

There’s less cognitive dissonance if you convince yourself some racism agaisnt a particular race is permissable, even less if you can rationalise that it’s not racism.

Yes, you can be racist against your own race.