I have a Jewish friend who chose not to circumcise her son, she tells me it is becoming more common. I have no idea.
My sister lived in a Muslim country where boys weren't circumcised as babies, think it was between 8 and 10 or maybe12. If they can wait that long I can't see why it would be a problem to wait till 18.
My husband was circumcised as a baby, he is from North America. My sons are all intact. We never considered it for a moment.
Why would I deliberately hurt my child, why would I risk a medical accident (they happen.) that could cause horrific problems for the rest of his life?
If we make this law we may not have 100% compliance for years but every journey starts with a single step so lets take that step.