The two aren't mutually exclusive. You can be an ally and want to overthrow racism here within our country yet still understand the fact that you benefit from said racism staying in place whether purposefully or passively.
Your point of departure assumes every white actually benefits, and of course, you can prove they did?
See the predicate of the left's entire ideological structure of identity politics presumes all people of a certain category experience life the same way, and also perpetrate the same actions. That's a fallacy. Groups don't have privilege, groups don't oppress, groups aren't racist - individuals do those things. You and other identity politics obsessors don't seem to be able to grasp that concept, you fight an entire group and wonder why individuals within that group feel defensive.
The perpetrators of the crimes, who are long dead and gone, have now been equated with the beneficiaries of their crimes. Another salient fact you seem to ignore is that the language used by publications like The Root is prejudicial in nature. All the articles posted from that site have created a mystique around this "whiteness" term, like it's some kind of disease that a person needs to be cured of. The long and the short of it is the radical left has identified its enemy, it's white people, and through using clever language they try and hide that fact, they try and make it seem like there are just elements they're targeting rather than the whole. But, of course, prejudice against whites is no concern of anyone's, they deserve it, right?
There's also this fallacy of protecting certain groups but not others with this critique of "Not all _________". A radical Muslim bombs a train station; "He's not a
real Muslim, not all Muslims do that". A black male robs a convenience store; "Not all black people are criminals". A white man says something racist; "Not all white - " , Nah, all whites. A man sexually assaults a woman; "Not all men are - ", Nah, all men.