The non white population you mean. Whites have been on a steady decline the last 80 years or so. You'd think the genocide and wars would have kept the world wide pop more manageable but alas it has not.

The white population has exploded. Denmark went from like 0.5-1 million to 5-6 million. It's possible that say a subset, say 50k out of the 500k exploded to 4 million, while the other 450k exploded to 1-2 million danes. Everyone danish, just slightly different phenotypes, temperament, morals, height, musculature, eyes, immune system etc.

This is of course conjecture, nothing proven or even substantiated by any evidence.

I'm not really sure exactly what you are saying here. These numbers are pretty clearly tracked historically. It's hasn't changed that drastically but yes there have been demographic shifts.

Its gradual. I remember when I first saw American television and people called themselves "white" lol. They were like muds. I realized that everything is relative and now I don't see it anymore because I've become used to it.