I would say if it weren't so commonplace it would seem a lot like a scar
Well, then, if it is commonplace and isn't viewed as a scar, does the "scar" matter? The only detriment to scars is that people don't like how they look, but I've yet to meet someone who absolutely hates the appearance of a circumcised penis because it's circumcised.
My nerve ending argument wasn't really about the pain. I don't know about you but I'd rather have more nerve endings on there if I'm having sex and would rather not lose those nerves without having any choice in the matter.
I don't think that the foreskin, being mostly just skin, has that many nerves in it - or nerves that do that sort of thing. Also, doesn't it pull back during sex?
You still haven't addressed any of my points about why it's done religiously, and just because it could possibly mean slightly less enjoyable sex is not a good reason to ban it.