People's religious beliefs shouldn't be able to override basic principles of law and humanity.
If you cut part of your son's penis off because you just felt like it you would be arrested. But ok, religion.
All animals need to be stunned before slaughter or it is animal cruelty. Except for religion.
It's either cruelty or its not. It's either a brutal act of child violence or it isn't.
Religious practices need to absorb and be consistent with the laws of the country they live.
I'd take every circumsised child into social services and never let the parents see them again.