A person born in 1970 in Sweden, a country which has no colonial history outside of Europe, would have started school in a nation that was still nearly 100% ethnically homogeneous. If current trends continue, he will be a minority in his native land as an old man. Not only does he have to endure this or be socially vilified and maybe fired from his job or worse, he has to fund his own colonization and publicly celebrate it as a great and positive development. There has been no full-scale armed invasion here, nor has any deadly plague devastated the native population, unless, that is, you count Multiculturalism as a plague, and perhaps you should.
White Westerners have given other peoples, including actively hostile tribes, the tools needed to multiply beyond their native capacity, the transportation needed to travel to our countries, the human rights legislation needed to settle here and the welfare states needed to exploit us.
My personal opinion is that this situation is so unnatural that it cannot go on for much longer, nor will it. For one thing, the Western world simply no longer possesses the physical capacity to fund all of this madness even if it wanted to. I strongly suspect that the current Western-created international political order will soon implode and may take many of the networks it created down with it. Most likely, the global population will be nowhere near the 10-12 billion people many demographers now predict by the year 2100. The simple fact is that the planet cannot support such numbers. Much of Africa can barely feed itself today and will collapse without continued external aid. Human numbers have become artificially inflated because of the technological civilization created by Europeans and could plummet within the coming one hundred years due to wars, epidemics, natural disasters and ecological collapse.