I'd say this - while interesting - does not show a thing. It happens that a billion or so people do this every year, so any actual public health effect should be quite noticeable. Instead, "the highest percentage change in age-standardized BMI related deaths and disability-adjusted life-years occurred in Bangladesh" (that is mostly a Sunni country) - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5866840/#Sec3ti...
Or see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3263199/ - "The recorded high prevalence of the MS and its key cardiovascular risk factors (15-60%) among Middle East population mandates the need for a national and international prevention programs to combat obesity, diabetes, hypertension, dyslipidemia, smoking and related comorbidities."
Or see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3263199/ - "The recorded high prevalence of the MS and its key cardiovascular risk factors (15-60%) among Middle East population mandates the need for a national and international prevention programs to combat obesity, diabetes, hypertension, dyslipidemia, smoking and related comorbidities."
So I'm not sold.