Logic says that the deliberate replacement is real since top politicians aren't actually stupid and even Muslims are publicly enjoying and bragging about the official prospects in numbers just a decade into the future through mass birthing alone.
But intent again doesn't matter and I haven't spent time researching it, cos results are results no matter the intent.
An official EU reason for mass migration that has been mainstream at least here in Denmark since the early 2000s is that people from countries that have many babies will help the western populations' in birth rates decline (only Africa doesn't have a decline though). That has been debunked by official Danish mainstream research though, as that declines happens with migrants overall as well when they rise in standards.
But like Bernie Sanders said in 2015 "Open borders makes everybody poorer". imgflip.com/gif/9pydh6
So I can only gather that with mass migration, you avoid assimilation through the overwhelming effect, and can basically keep them poor and fruitful on the most stretched out welfare system in history.
