"Japanese" is as much a social construct as "whiteness," actually, but "Japanese," (like "French," or "British", or "Nigerian", etc.) isn't a necessarily harmful one (except inasmuch as nationalism is bad, but I don't want to get into that right now).
So whether a race or nationality needs to be destroyed is based on how harmful you believe it to be? No thanks.
Whiteness, like nobility, is a social construct that functions by defining and dispossessing an underclass. For a nobility to exist, there must be an oppressed peasantry. For "white people" to exist, there must be oppressed people of color. For capitalists to exist, there must be an oppressed working class. And so on.
I simply reject this premise.
Your dishonest (or perhaps ignorant) rhetorical sleight of hand is in comparing "white", which is a racial category, with nationalities. "White" is not a nationality. It is not a category comparable to "Nigerian," "Japanese," or "Israeli."
It's interesting you bring up Israel - I do indeed believe that Israel needs to lose its explicitly "Jewish" character because the alternative is maintaining a system of apartheid to dispossess and disenfranchise much of its population.
It's amusing that you talk about dishonesty and then go and change the words I used. I said 'Jewish', 'black', and 'Japanese'.
I think race and ethnicity are interchangable in this context, and indeed you admitted so yourself above. Also, while Europeans have their own identities, as I understand it, Americans of European decent see themselves as 'white Americans', but obviously distinct from other white people. This is also true in some other racially diverse new world countries like Brazil. So your distinction doesn't have much practical value.
You're welcome to your views on Israel, but the point, as I'm sure you know, is whether Israelis are talking about 'Jewish privilege' or the Japanese are talking about 'Japanese privilege' and how to fight it, etc. They are not, of course.
You've already signaled what your position is. But sure, if you want to explain it more clearly go for it.
How could I have signalled any position on your ideas if I don't know what they are? I rejected your one proposal because, quite apart from anything else, it will never happen.