>>31044977Studies show that when white people are made aware that the demographics of their countries are changinging dramatically over a short period of time, they become more hostile towards people of other ethnicities.
The above is literally from a wikipedia article about the decline of white populations in their own countries.
So in other words, it's to make sure that white populations don't push back at the idea of being replaced. The US was 85%+ White European for more than 220 years since its founding up until the late 1990s. Now, in a single generation, it's only 60% White European and more than half of the children born in the US today are non-white.