“If you are not a believer what does it matter?”
—Clearly, it matters to these parents. Don’t you think it should be their call?—
You two are really talking about different things.
As to “Don’t you think it should be their call?” — obviously, yes. But I don’t know why it would be of any concern unless one thought the act imparted some sort of mystical something on to the child.
Same for the “non-invasive Muslim purification ceremony” (what ever that is). If it is non-invasive how can it affect anything?
That parents may not want these done for whatever reason — that’s a different issue than whether or not it causes harm or any sort of tangible change.
No one is arguing that it causes harm, so I'm not sure how your comment is relevant. Parental prerogative is the issue being discussed.