I have researched for myself that the AMA, the pediactric association (whatever it names itslef) and many other references all are acutally against the procedure.
The most recent statement I can find regarding the the AAP's (American Academy of Pediatrics) position is one of neutrality toward circumcision, neither recommending routine neonatal circumcision nor discouraging it. The AMA endorses the AAP's statement.
Existing scientific evidence demonstrates potential medical benefits of newborn male circumcision; however, these data are not sufficient to recommend routine neonatal circumcision. In circumstances in which there are potential benefits and risks, yet the procedure is not essential to the child's current well-being, parents should determine what is in the best interest of the child. To make an informed choice, parents of all male infants should be given accurate and unbiased information and be provided the opportunity to discuss this decision. If a decision for circumcision is made, procedural analgesia should be provided.
There is a big difference between saying there isn't sufficient data to recommend something and coming out against it. If the AAP and AMA were truly declaring their organizations to be anti-circumcision, I doubt they would so readily leave the decision, in most cases, to the parents.
In your situation, the following sentence may give you some guidance:
To make an informed choice, parents of all male infants should be given accurate and unbiased information and be provided the opportunity to discuss this decision.
If you do not see yourself being able to offer unbiased information (meaning you can have a bias; you just can't allow it to show), then you might want to defer this part of your patient's care to either the ped/OB or another nurse who can explain the procedure and its risks vs. benefits in an impartial manner.
Another suggestion is that your unit provide parents with an information sheet that covers the topics with both the risks and the benefits presented in a factual, non-emotional manner. This could certainly include the AAP statement along with your unit's policy regarding pain management.
Incidentally, both the AAP and the AMA stress giving serious attention to adequate pain management before, during, and after the procedure.