Personal freedom trumps tradition and culture. Always. That's what freedom means. These traditions, mostly religious based, all tell you that you shouldn't have sex before marriage, right? So why can't they let people decide to get circumcised (or not, as the case may be) on their wedding day? Oh I know, because it's a lot harder to control people when they're not infants.
So you're one step further than I thought: you don't see circumcision as a symbol for violation of personal freedom; you see it as an absolute violation of personal freedom. I disagree with this because circumcision is a minor alteration of the appearance, which has no consequences at any point later in life. I mean, why don't you rebel against the way the gynaecologist tied your navel? Aren't we free to choose how our own belly button looks like? When you're a child, it's normal that superiors (in nature parents) take some decision for you, because you can't live independently. And as long as these decision don't have any negative effects, I don't see anything wrong with it.
If we held you down and drew doodles on your face with a marker, would you mind? After all, it's important to some of our cultural values. I mean surely you can take this one for the team, right?
If you did that, I would mind because
a) I'm not a child that you're taking care of,
b) It would cause social isolation, hence negative consequences
On the other hand, if my parents drew doodles on my face when I was a kid, and it wouldn't have any negative effects at any point later in my life, then I wouldn't mind. Just like I don't mind being baptized.