I'm not certain "start a war with half the region that gets the other friendlier half of the region's entire economic engine blown up by Iran" counts as viable in the long run.
You live in stolen land, surrounded by people that hate you (the number which is growing daily), run by genocidal thugs who are on a fascist death drive. That is non viable, pal.
“Social conditioning” does not strictly determine the birth rate of developed nations. For that you must look at economic policy making it financially untenable to build a family. What you conveniently ignore here is Israel’s own economic policy of subsidizing orthodox jewish families, which is the main source of that growth.