Middle easterners and Muslims in general have a lot of kids.
Vague, non-specific, evidence-free comments in highly sensitive areas lead to all sorts of bad stuff.
https://www.pewresearch.org/short-reads/2017/04/06/why-musli...
However, that's not really a correlation, which is important: For example, I'd guess that people who are Muslim (an incredibly large, diverse set of people) on average buy fewer winter coats than people who are Shinto. That tells us nothing about the religion of Islam, other than some geography.