The “population bomb” only works in a certain model, with certain characteristics, and theoretic ingredients.
Germany today has 80 million residents. In 2060, unless something happens to prevent it....it will be down to 64 million residents. Families are mostly having child only, and a quarter of population isn’t interested in having any kids. All of this comes from concept that women found education....were happy with careers, and just didn’t want motherhood tied to them.
By the end of the century....if nothing occurs to change the pace...Germany will have half the population that it has today.
The gap in population in the West will be filled by (Islamic) immigration.
The Muzzies are more than happy to move in and replenish the population....