Religious and Parental Rights Defense Act of 2011 - Prohibits a state or a political subdivision from adopting or continuing in force a law, regulation, or order that prohibits or regulates the circumcision of males who have not attained the age of 18 years and whose parent or guardian has consented to the circumcision, unless such law, regulation, or order applies to all such circumcisions performed in the state and is limited to ensuring that all such circumcisions are performed in a hygienic manner.