This is the idea that anyone who is worried about fertility is a racist — that non-white people are out breeding white people. This is known as the Great Replacement theory in some circles.
I’m not going to indulge this argument. I have an extremely strong aversion to any sort of argument that relies on some form of “agree with me or otherwise you are racist.”
It's obviously the downfall of religion and family values; it's obviously urbanization; it's obviously the culture, it's obviously house prices, it's obviously gender equality, etc.
There's nothing obvious here. As with most sociological problems, many of the factors are recursive. Many of the cultural, economic, and sociological factors are intertwined, and it’s not immediately obvious which factor serves as the initial seed.
In this video he frames the birth rate crisis as a moral failure, and that younger people have an obligation to continue their genetic lineage.