no, I don't understand it for religious reasons. just because it's done in the name of religion doesn't make it any less barbaric.
unless it is done for medical reasons it is, IMO, barbaricand should be made illegal.
and I see no reason why I should respect someone's need to mutilate their perfectly healthy child just because God says so.
lots of people don't adhere to everything about their religion, I certainly know of many muslems who drink, and I also know some who have not been circumsised.