Is to simply never identify as "white" and only ever identify with your ethnic sub-type.
Western countries got cucked with universalist christjewery. Not having a caste system like the jeets have is why we are in the mess we're in.
"White" then becomes a secularized stand-in for universalized "christendom", where even the lowest scum is equal to the higher castes. Even the lowest leftist can self-identify as white and then take ownership of white, and all those they label white. They become the spokespersons and representatives of the whites to the ethnics, the judge of the behavior of other whites relative to their socially constructed commandments of white, and they can militate against white to signal their piety.
So, only identity with your ethnic sub-type and sue anyone who labels you white. If you're a mutt self-identify as something like "Celto-Germanic" or roundup (could a jew, Russian, or an Italian take ownership/spokesperson/representative of Celto-Germanic? See the power of "white"?). Then if you ever apply to college or for a job and are forced to identify as white instead of your ethnic sub-type, sue them!
All those civil rights laws that protect "minorities" apply to you the moment you exclusively identify with your ethnicity.
In a time when people are being imprisoned and sued for misgendering someone or not using the correct pronouns, this is something that every ethnic European should pursue!