How do we respond to the suicidal ignorance of young whites and suburban liberals of multicultural multi-ethnic societies?

If young whites and suburban liberals knew that multicultural multi-ethnic societies are a zero sum game where the gain of one ethnic group is offset by the loss of another ethnic group, and that their efforts in promoting nonwhites, supporting the rioting black lives matter moment, and labeling whites as evil racists, is malignantly suicidal, would they still support multicultural multi-ethnic societies? The answer is, yes, many of them would accept the suicide of their own ethnic group. Young whites and suburban liberals say things like, “Who cares if whites disappear? All whites have ever done is create wars and destroy the environment.” That is how astoundingly successful the schools and the media, mostly the media, have been in promoting multicultural multi-ethnic societies!  

How do we to respond to such dangerous ignorance? America and the West is in full identity crisis caused by the schools and the media who have successfully imposed a radical displacement of American culture with a cultural Marxism that affirms nonwhites over whites, disguised as a call for equality. How will we deal with the demographic changes in America when we know that as the demographics change the culture changes? Can we hope only for more people to become populist-nationalists in the face of a powerful media which hates all "deplorables" living between the East and West coast? 

I can only quote E. O. Wilson: "The genes hold culture on a leash. The leash is very long, but inevitably values will be constrained in accordance with their effects on the human gene pool. The brain is a product of evolution. Human behavior...is the circuitous technique by which human genetic material has been and will be kept intact...” 

Although now just rising, I believe identity politics will continue to ascend, but not without big difficulties. Identifying with ethnicity, nationality, race, culture and faith is the world's future. People will see that diversity within the same state is not our greatest strength but is a weakness. A true natural rights or civil rights movement would promote an ethnopluralism of ethnostates for all groups, black, white, brown, yellow, or red, with each ethnostate protected from marauding imperialists, global businesses, supremacists, Marxists, etc., and defended by a defensive federalism. An ethnopluralism of ethnostates could be established legally in the United States with our constitutional separation of powers and states.