Sorry if this pops some corks, but I offer this theory in favor of circumcision: it makes for greater intelligence! Circumcision makes the mind more complicated, more sophisticated, smarter, as opposed to simple-minded.
It introduces more stimulation, sexual stimulation, into the neural core of the developing mind's neural networking, like in the brainstem, medula oblongata, the reticular activating system, and the hypothalamus, which Nature otherwise largely postpones until adolescence when the penis is so often erected and extending out of the isolation of the foreskin.
A more developed, more complicated core of a neural network leads to greater, richer, branching of the neural network as the infant grows. Sex is more deeply integrated into the core of the developing self.
It probably leads to deeper bonding with the mother who then often touches the sensitive parts of the exposed penis in changing diapers, bathing, etc.
If, as I am arguing, there is this benefit of increasing intelligence, it makes sense for parents to make this choice for their child. Then, arguably, it is morally defensible for Jews and Muslims to have been doing this for so long, and Americans generally since World War 2.
Getting hung up on the procedure itself, surgery involving some pain, blood and crying is missing the point. The argument that the baby never gets over the trauma is contradicted by history, but we now have the means with anesthetics to minimize or even eliminate such pain, which is probably the better way to go about it.
The discussion in the Bible about Abraham doing it, offers the notion that it will provide such advantage as to create a special people that will spread all over the earth.
The comic apparently didn't consider such benefit, nor those he interviewed, nor those commenting here. Defenders' justifications have been either for health reasons or just because of Abraham's deal with the divine.