Diversity? Leftist nonsense.
There is no tangible benefit to diversity - much the contrary. Would you rather be treated in a hospital that prides itself in its "diversity" or one that prides itself in employing only the best doctors, regardless of gender, race, or ethnicity? Same for a private company. Would you want to work for a company that prides itself on promoting a diverse group of managers, or one that prides itself on being a pure meritocracy?
Same for a school. There is not a single, measurable academic outcome that is improved by campaigns to increase diversity. Who benefits when AP classes are populated by minorities who don't actually meet the criteria to be in them?
What happens to elite universities when they start admitting significant numbers of unqualified "minority" students? They have to start offering remedial classes to incoming Freshmen. They have to offer courses and even majors that have low academic rigor, because if they don't then the minorities they have admitted will all start failing. Is the school any "better" because of the presence of minorities who can't really cut it? Does it even help those who have been admitted on that basis? They are not so stupid as not to realize that they are at the bottom of the academic barrel.
White people run the entire gamut from brilliant to retarded, virtuous to diabolical. But look around the world at countries that heretofore had ethnic uniformity and now have "diversity." Look at Scandanavia, Germany, France, and to a lesser extent Great Britain. In all cases, their societies and cultures have suffered with the influx of outsiders who are - broadly speaking - intellectually and culturally inferior.
As for "White America," there is not now and never could be such a country. But it is interesting to imagine how the U.S. would allofasudden look a hell of a lot better in international comparisons if only white people were counted, and the averages were not polluted by "minorities" who are less intelligent, less diligent, culturally deficient, and disproportionately criminal.