A meaningful set of questions that a serious country might give its people would be something like:
1) Do you want to turn over the state that your ancestors spent centuries worth of blood sweat and tears building to people who are utterly indifferent to that heritage at best and outright hostile to it at worst? To people whose first principles exist in opposition to your own? To people who think that it’s the duty of the native population to adapt to the immigrants rather than the other way around?
2) What are the unifying principles of the post-national state going to be? How will its diverse peoples smooth over differences of opinion and forge forward in building the future? What will unite them in times of poverty and famine, and keep the state from fracturing along ethnic lines, as many multi-ethnic states have in times of trouble? What will get two people who have no ethnic, religious or ideological commonalities beyond “Diversity is our strength” into a foxhole together to defend against an enemy that threatens the post-national state?(As an aside, most liberals in 2018 confirm the enduring bonds of ethnicity whenever they bitch about having to go to Christmas or Thanksgiving with their MAGA uncle. They put up with it because people will tolerate things from their family that they would never put up with from anyone else, and ethnicity is basically a big extended family)
3) Do you want to leave for your descendants a future where they live as a despised minority, with their continued existence totally at the mercy of a majority who are conditioned from birth to believe that every misfortune or inconvenience they experience is ultimately the work of whites?
4) Do you really believe that you have the right to make such a choice for future generations?
5) If you answered yes to #3 and #4, can you think of any particular group who lived like that in the past, and if so, how did that work out for them in the long run?