The ultra-orthodox kid culture that they are surrounded by, combined with less uncertainty for their nation since the ‘90s, IMO could contribute to it.
Jews in the US have a particularly low birth rate around 1.5, so I don’t think the religious heritage alone explains it.
“Jews in the US have a particularly low birth rate around 1.5, so I don’t think the religious heritage alone explains it.”
The non- or only slightly religious have much higher intermarriage rates, and then have less children per couple on average. The more religious one gets, the less intermarriage and the larger the number of children per couple. The problem for Jews in the US is that probably 80% are JINOs, so only 20% is actively boosting their population. It’ll likely still decline for a while, but will pick up as the religious become a higher percentage of the Jewish population. Of course, a lot of the religious leave for Israel, which goes far toward explaining the current state of American Jewish and Israeli demographics.