There is simply no good reason to do it and a plethora of reasons not to. It's not rocket science, as was said. In the film "Cut" several Rabbis and Mohels are interviewed, and one was surprised that gentiles actually practiced circumcision, saying "Why would anyone do this? It's horrible. We HAVE to do it, but anyone else who does this to a child should be put in prison." I think someday that will happen (imprisonment -- this is serious, folks -- you get 23-to-life for infant sexual assault of any OTHER type). Keeping the Covenant between Abraham and G-d is at least a REASON. Jews may, and do, debate whether it is a "good enough" or "real enough" reason, and debate they should (because I have yet to meet a Jew who is happy he was cut, either, even though he has a LOT more skin left than a cut American gentile). However, non-Jews have no such excuse, they have NO excuse, and richly deserve the blame of their sons and of The Law (of man, and of G-d, too).
Yeah, you could say it takes a real man to face the fact that something horrible was done to him (by his parents), and either blame them or forgive them, or both, and then make the decision NOT to pass on the hate and hurt to his own sons, i.e., to OWN it. It's not to say that women lack the courage to face reality, but women are forced to face reality almost daily (certainly monthly) by their biology -- men aren't -- so it's second nature to a woman. To have the courage to not pass it on, a man must fight with himself on mental and spiritual level, to bring to the surface and to own his fears about how the people he trusted didn't project him, how his life and his body are really the playthings of others, how he's maimed, etc. A woman has to go AGAINST, to betray, her own nature, that is, the natural instinct to protect her babies at a purely animal level against all dangers, even at the expense of her own safety or life, in order to give her son up to circumcision. To hand her baby over to a stranger to then be physically assaulted -- in any way -- is totally against the nature of any mother, human or animal. It's very strange and sad commentary that American mothers routinely allow this and then pat themselves on the backs for what "good mommies" they are for having done it. It's fascinating, and worthy of study...if you can get past the horror of it.
from Facebook post