[..]
Also, the idea that removal of the foreskin is in any way akin to female circumcision (which generally means removal of the clitoris or more) is totally bogus. [..]
Your premise is false, so your conclusion is false. Female circumcision does not generally mean "removal of the clitoris or more". It's politically effective to take the most extreme form and lead people to believe that all forms are the most extreme form, because few people check what they're told.
There isn't a direct parallel because there are some physical differences between male and female genitalia and there's no equivalent to completely removing the protection of the penile glans.
The closest equivalent would be cutting off the clitoral hood and enough of the labia to make the same degree of difference to appearance (which would be quite a lot). Which is what happens in most cases of female circumcusion.
Outside of religion, the reason why circumcision started to be forced on infants and children was to stop masturbation in Victorian times, when they had an obsession with masturbation.
Anyone who doesn't believe me should check history for themself. It's not ancient history and it's not hidden.
Imagine these scenarions happening today:
i) Some people found a new religion and claim that it requires them to cut off the clitoral hood and much of the labia from all their female children at a very young age.
ii) Some people claim that masturbation is wrong and morally dirty and that as a result they cut off the clitoral hood and much of the labia from all their female children at a very young age in the belief that this will stop them masturbating.
Does anyone think either of those scenarios would be considered good enough reason to ignore the laws against mutilating children?
So why is it OK to do it to boys (worse, actually, as there isn't a direct parallel, but that's the closest) for those reasons?