I do not see this as an argument for or against. There does not need to be scientific evidence to say you should or shouldn't. This is a parental decision and that's all it is. If the parents do not want to research it, before making their decision, that's their fault.
There is no evidence that foreskin or lack of, has any effect on anything. This can go back and forth forever, as people have different views. this is still a parental decision and that's all it is.
If people do it, because it's the "norm" then that's their rights. If they choose not to, then that's their rights.
If you have children, then you have made your decision. If you don't have children yet, then you get to make your decision, when the time comes.
If you do plan to have it done, then the best time to do it is when they are babies. They forget the pain quickly and will heal faster. I would not want to have it done as an adult, you would then have the memories of the event.