Because the UN expects the population to double by 2070?

That's a simple extrapolation of growth rates and some assumptions about improvements in mortality.

110 new homes isn't going to make a dent in raising an army.

That and the whole refugee problem in Europe. If we could fix the problems driving refugees out, then great. If we are creating more future refugees (a pattern which could easily be weaponized by destabilizing countries and then propagandizing their plight, for example), then not sure that’s such a good idea.

Oh and also you don’t have to look forwards at projections, you can look backwards at the population growth, it’s not as if this sort of thing just started yesterday.