A few points on the inevitable question, demonstrated in this video, which is posed to any white person with the audacity to try and protect their in-group in the same fashion as the remaining 99 percent of the human race. The response in the video is half correct. It is indeed relevant to point out that this is a question only asked of white people. However, it is more relevant that this only a question you will hear from a population that is European, of European extraction, or of an ethno-racial minority living in the nations that ethnic Europeans founded. This is because the premise of the question derives from the idiosyncrasies of Western European culture. Such a question makes no sense to anyone else. This question is "who is white", "who is white enough to be considered white", "I have a black great grandparent, am I white?" etc. etc. We’ve all heard it before. All the various forms of this type of "gotcha" question are essentially rehashes of the ancient Sorites Paradox, and thus they have no easy answer. How many grains of sand must be removed for a mound of sand to cease being a mound? How many hairs does a person need to lose before they become balled? No one knows. But everyone knows a balled man when they see one.
Thus, rather than fighting uphill trying to defend the existence of certain categories against an attack on categories that is famously unresolvable, let the left do the heavy lifting. They only way through a mob of brain dead lunatics that outnumbers you and your allies so hopelessly, is to use their energy against them. Apply some good old alt-right memetic ju jitsu.
Tell whoever is asking "well, just who qualifies as 'white' Mr. Racist?" that your definition is exactly the same as whatever affirmative action tsar is barring your children from entry to a university. It is the same as any company that is looking for a position for which white people needn't apply. Tell them that you class whoever is "white" by whoever has "white privilege". This will quickly establish that their issue is not with the category of "white person", but rather you using this category to argue a point they don't like. The left is not only perfectly comfortable with this category themselves, but they are responsible for keeping it formalized in the modern Western world. “white privilege”, “white supremacy”, “white flight”. Without the category of "white person", how do you extract wealth and opportunity from them to build your utopia? You don’t, and thus it will always have value to them, meaning they will always argue for it when it suits them. So, when you are asked who classifies as a white person, refer them back to their own ideological handiwork.
This strategy also makes a particularly prescient point for people like me who, left to their own devices, wouldn’t be making any effort to assist “white people” as a category anyway. As I have mentioned elsewhere, in my heart of hearts, I am a dirty naïve secular humanist of the Jean Luc Picard variety. However, I have also come to realize that one’s identity is only half ones’ own choice. The other half is what other people, and institutions do in response to the identity category they place you in. If you are surrounded by other white people who also don’t think they are white because, “who classifies as white anyway”, then you are fine. However, if you are surrounded by people who do not consider themselves white, consider you white, and have grievances, or just the standard tribal impulse to protect ones own and accrue power, your hoity toity philosophy on the non-racial implications of the Sorites Saradox will not get you very far. More importantly, it will not get your wife, husband, or children very far.
Unlike many of my newly adopted “far right” kin, I would ideally want to live in a world of raceless individuals, but I am also aware that no matter how I feel about not believing I am “white”, or that the category is unhelpful, leftists, and indeed the entire rest of the world, feel quite differently. This is as true of the leftists running the institutions that govern the country I live in, as it is of the population soon to replace my own in that country, who do not think they are "white" and who think that I, and my children, owe them something because we are. I am sane enough to know that this matters, and will only matter more as white people become a smaller minority around the world and within their own countries. My child will be the white kid if he goes to a school filled with the progeny of another human phenotype, and no amount of “my daddy doesn’t believe in race” will stop the bullying. Nor will it stop the constant psychological guilt barrage likely coming from his teachers, informing him that he is an oppressor, should be ashamed about his history, and owes non-whites something as a result. South Africa teaches us that this does not stop when white people become a politically powerless minority. If anything it gets worse. When white people are eventually outnumbered in every nation of Earth, they will realize that no matter how much they don’t want to politically organize around their ethnic or racial identity because it makes them feel icky, everyone else will.
People like me would like to see everyone sober up before it gets to that point. That is why we must use the left’s reasoning against them. If white people don’t exist, then neither does white privilege, nor does the legitimate use of affirmative action since "who is white anyway". Hell, if the opposite happens and this tactic does somehow show the absurdity of racial categories and usher in a world that genuinenly only recognizes individuals regardless of race or ethnicity, then so much the better for people like me. However, since we know these things are sacred to the left, and the remaining 90 percent of humanity outside the West don't know what an "individual" looks like but they hear white people like them or something, I won't hold my breath. So don’t waste time explaining what a white person is to the left. Point to their own definitions.