He may choose to define himself as that if he wishes. And we'd still be free to define him as White or not, as is our wish.
That is how categories work. It is at the discretion of the categoriser. It does not require consent or agreement from the categorised.
Jews are not White.
Caucasian plus mixed with other DNA yes. White, no.
White does not refer to skin colour, which Jews can share, but the very fact a person is "of European descent, without large or discernible admixture, and NON-Jewish".
I.e. the definition of White used for communication here is not an exact synonym for caucasian.
White, European, Caucasian, these each have their own nuances of meaning.
White, as used by people who are for the survival of the White race, and not ambivalent to it, and who have informed themselves of the issues facing it, counts people of European descent who are non-Jewish only.
If you are still confused think of White as shorthand for signifying a "White Aryan".
You would not claim that Jews are Aryan would you?
And if you are still confused, you can understand White = Amalek.
You would not claim Jews are Amalek would you? (at least via the modern use of the term).
Life is easy if you understand how language works.
A word used by a person, signifies what they intended to convey via their choice in word used.
This does not change by you wishing to impose your own definition on their word.
Even if you could successfully do so, you'd then only necessitate a change in word choice, not the actual argument, or thought form, which would remain the same.
The new word would still signify, in this case, X people, with Jews excluded. And would remain valid as such.
It is a stupid game to play.
And one you can solve yourself without troubling others. When you see a pro-White write White, understand he means, if you think White includes Jews, Whites minus Jews. So when you see his writing, just pretend instead of it just saying "Whites" it says "Whites minus Jews" and there, hey presto, you will be able to avoid making an issue about your own lack of understanding, and move on.
i.e. Jews are not included in "Whites minus Jews", or simply "Whites".
Whites and Jews are not the same people. i.e. DIFFERENT culture, DIFFERENT attributes, DIFFERENT histories. DIFFERENT orientations. DIFFERENT DNA. DIFFERENT ancestries. DIFFERENT Gods.
When DNA for various groups are plotted Ashkenazi Jews CLEARLY align equidistant between actual European Whites, and modern Middle Easterners. i.e. with admixture from both.
European Whites however, do not show such a mix, and appear separately when plotted, without overlap. Jews are genetically distinct from European Whites. Yes, even Ashkenazi Jews.