That's definitely true! There's a lot of disparity in the U.S. that often doesn't get talked about.
The sad thing about circumcision is that a lot of times, parents don't even have a choice. I have read a shocking amount of stories where doctors did it anyways because it's assumed. It's pretty disgusting. After being educated about it, a lot of mothers have regret for having it done to their child.
I don't think it's repressed anger, though. People do it because of tradition, for the most part. More people are getting educated about it, though, so I think that's a step towards progress.