First, I don't accept your assertion that mass immigration is not a real thing. You should show how it is not. Second, the large wave of immigrants that came to Europe recently...
It isn't enough people to be considered "mass immigration." Also people returning home after fighting has settled down doesn't mean they were not refugees.
Enough people to become majority in a few decades is not mass immigration? You really think this? These are projections for current immigration policy for several western countries.
The reason anyone else would become the majority is actually due to low birth rates of people from those nations. People dont have enough babies. People need to have at least 3.
If everyone did this, the population explosion would be a bigger and bigger problem. Also, it is not wrong for populations to shrink. We have been through this before. Did you forget?
OK. You keep being wrong, which not so bad, but then you are obnoxious about it, which is not fine. I noticed you backed off when I asked you to give me your best argument properly.
I didn't back off. I'm just not repeating myself. I gave you the argument in the form of your formula, and the actual example laid out. I'm not going to dumb it down anymore.
From what you have said so far it seems you want a even more liberal policy, where these countries would be flooded with immigrants in maybe one decade, until they broke down
Population explosions in Africa are projected to lead to much more people wanting to move than now actually. In general, Africa is not a good place to live compared to the west
Already there are quite some signs of what's to come. Sharia courts for example are in place today in Britain(not above British law, but still operating as if being legal institutions)
Or you could look to South Africa, where white farmers now are being killed for being white, even a politician singing from stage stuff that strongly suggests killing of whites.