... It is an unchallenged remnant of many things, a large chunk of those things having puritanical religious origins.
And almost all those religions happen to be Jesus-centric.
Kellogg was just a more recent large scale eh... reinforcment of the norm. He was inspired by his particular Christian views... 7th Day Adventist.
Like, yes, its not as direct as many modern preachers constantly doing sermons about the virtuosity of circumcision... but even still, I can easily say that the reason the practice is unchallenged is that American Protestant Christians of many, many different Denominations... well they strongly promote traditionalism for the sake of tradition, not questioning authority figures, actively rejecting modern science and medicine.
Like uh... Max Weber's christian protestant work ethic explanation of the peculiarities of American culture in regards to attitudes toward work and politics and many other cultural features... isn't 100% perfect... but it is a very good starting point to understand why American Protestantism is sociologically distinct to other societies.
Discussing it isn't an obsession, an obsession would be making your whole personality about it, or basically having that be a primary hobby or something.
You are doing a less extreme version of the thing that politcal news pundits do against protests:
Protesting as a concept is fine, but it turns out any protest with views I disagree with? Well they're protesting wrong.
If you are reading this as an obsession, I dunno what to tell you, check my comment history and you'll see this is the first thread I've ever mentioned it in, and my older, nearly year old account? Don't think I ever mentioned it.
Finally: Yes, female genital mutilation is very often much, much worse, in that it usually entails total removal of the clitoris, which is... basically fundamental to the ability of a woman to experience pleasure and orgasm.
But that doesn't mean male genital mutilation is not also bad. The male hood also generally has a much higher concentration of nerve endings than... basically everywhere other than the head.
And both of these practices fundamentally remove bodily autonomy from a baby/child, and are culturally/religiously done for reasons that ultimately or directly arise from a very paternalistic and authoritarian approach to children as property of parents, and intending to diminish and control their sexual characteristics without consent.
... But if you don't wanna have this discussion, feel free to block me, or just... not discuss... this...?