I’m well aware of the "All White People Are Racist" (re)definition of racism. I just think it’s embarrasingly stupid. I prefer to go with Martiin Luther King's definition. Though no doubt you'd consider him a foot soldier for white supremacy too.
If you think that Rebecca has never implied that white people never experience mistreatment or rejection I suspect you haven't read much of her "work".
https://momentum.medium.com/youve-got-loads-of-white-privilege-start-sharing-it-9c3524d0cd38
The way she describes white privilege in these articles isn’t the perfectly valid observation that any mistreatment white people face is unlikley to be because of the colour of their skin. Or that the history of discrimination and Jim Crow disadvantages black people in a way white people don’t face. It’s a bizarre, ludicrously simplistic fantasy land where they get whatever job they want, are treated kindly by everybody, and are never treated with suspicion.
Also, your assertion that she's describing how white privilege affects white people in general rather than the white person she's speaking to doesn't make any sense giiven the actual article. She doesn't say she tries to explain white privilege, she says she tries to explain THEIR privilege.
It's so bizarre that you imagine I don't understand white privilege or race issues in general. You have literally no reason other than your childish projections for presuming otherwise. I understand what white privilege is. I also understand that telling somebody what their life experience has been is hopelessly arrogant. I've been treated better in some ways than some of my white friends. I've been treated worse in some ways than some of my black friends. Groups of people aren't monoliths. We can attack white privilege as a concept without attacking white people.
You can try to insult me all you like. Responding in kind is beneath me, and would be beneath you if you had anything of any value to say. I've done and will continue to do everything I can to fight racism. I refuse to judge people by the colour of their skin regardless of what that colour is. It saddens me greatly that there are black people who don't understand the importance of that after all our people have been through.
