Algeria and Morocco hardly seem "fairly well-off" countries, considering how many of their citizens prefer moving to the low-birth rate European countries you loathe. High birth rate of Israel is also unsustainable from economic perspective, as it relies mostly on orthodox Jews who on average are much poorer, less educated, and contribute less to the Israeli economy.

I'm not saying fast fall in birth rates isn't a problem, it obviously is. However, nearly all countries that don't have this problem offer much worse quality of life than those which do.