José
A few comments:
I find your use of racial terms (white, black, asian) to be abhorrent. I find your description of the US as a "white European" nation to be abhorrent. I find the idea of ethnic supremacism to be repulsive, including the accusation that one particular ethnic group believes themselves to be superior to others (you are aware that is an old anti-semitic canard, yes?)
We agree that it is permissible, even encouraged, to have nations which represent a homogeneous ethnicity or culture, based on the principle of self-determination and the preservation of that culture. (Although I hope we also agree that the rights of minority ethnic groups or cultures within that nation must be safe-guarded and protected.) We agree that it is permissible to have borders between these nations and that each nation has the right to control who passes those borders. We even agree that it is permissible for nations, in order to preserve their ethnic and cultural integrity, to control immigration. (Although, I would suggest that this be expressed in positive terms where immigration by those of the nation's ethnicity and culture is encouraged and never expressed in terms of refusing people of a certain ethnicity, race or religion. And I would also suggest that not all nations are founded on the principle of homogeneity and for these nations diversity is to be embraced. Canada and the US are examples.)
Where you go sideways is with Israel and wanna-be Palestine. Your case is built around the idea that Israel and Palestine are not yet "real" nations and therefore there should be no segregation. But you also say that people should have freedom of association and the right to build nations based on ethnic homogeneity.
Now, if you are going to argue, in principle, that until a treaty is signed and a boundary is created between two "real" nations (Israel and Palestine) that there can be no segregation and all peoples should have freedom of movement within the territory, I'm not going to argue with you. Unless you apply that principle only to Arabs and not to Jews. Then I will remind you that your argument is inconsistent and discriminatory.
Let me give you some examples: You will agree that Jewish people can buy property and build a house, a town, or anything else they want anywhere in the territory in question, say, in the middle of Ramallah, or Gaza City. You will agree that all laws which forbid the sale of property to Jews are immoral and illegal and will be abolished. You will agree that Jews are permitted to use any of the gates to access the Temple Mount and be permitted to hold any type of service, religious practice or worship there. You agree that pilgrimages of Jewish people in large numbers to places which are Holy to them must be allowed on religiously appropriate times and dates.
Of course, if you DO argue for this principle, you will have to explain to me what practical steps you believe to be morally correct and appropriate to prevent, reduce and respond to the inevitable violence which will occur between the two groups who are currently quite antagonistic towards one another.