You have some rather inaccurate views on Islam. Islam has nothing to say about female circumcision, although it is true that the practice is not uncommon in some Muslim societies. It is also not an Islamic practice to assault wives for leaving the house without permission, although again it does go on. Just because such practices exist in Muslim societies does not mean that they are Islamic.

But you raise an interesting issue, how far can the mutilation of an infant or child be justified if carried out for religious reasons? It is accepted now I think largely because it is held to be good for the child, not as you suggest for religious reasons. This is the difference between male and female circumcision, the former is generally supposed to be a benign and helpful procedure, the latter the reverse. I suppose the question is how confident we are that the procedure is helpful, and how important is it that it be carried out at such an early age, as against interfering in the rights of the individual to hold onto his various bits and pieces. I do not know what science suggests on this issue, but it had better be a pretty strong argument. Otherwise assault on the individual in this radical sort of way would be very difficult to justify.