Male circumcision is a practical way of ensuring male hygiene, and reducing disease when you're wandering about in the desert with sporadic access to water in a pre-condom world. I'm not up on Jewish hygiene practices, but for Islam cleanliness is a fundamental part of life.
When constructing a philosophy for you and your community to live your lives by, including cleanliness is pretty reasonable. Who here likes sitting next to smelly people on a bus? Or thinks cooks should wash their hands?
Even the most cursory google debunks the hygiene argument in about 4 seconds
Darby describes these theories as "conflicting", and states that "the only point of agreement among proponents of the various theories is that promoting good health had nothing to do with it."
Even the most cursory google debunks the hygiene argument in about 4 seconds
https://en.m.wikipedia.org/wiki/History_of_male_circumcision