“Orthodox Jews argue that prohibiting the circumcision of children would be a restriction on religious freedom. However, the state has regularly restricted religious freedom when it is felt that such practices would be deleterious to minors. The obvious example is the over-riding of the Jehovah’s Witnesses’ ban on blood transfusions for their children. The issue with circumcision is not one of life and death*, but it does seem to me that the San Francisco referendum would not ipso facto be unconstitutional.
[…]
Despite having circumcised my two sons, the more I think about the issue, the more likely – were I a resident of San Francisco – I would support the referendum.”
Full writing here: http://www.sandfordborins.com/2011/06/09/the-circumcision-referendum-a-liberal-jewish-perspective/
*Note: Circumcision causes immediate damage to the penis, has resulted in numerous cases of botches which require surgery or additional medical treatment, and it has also been known to kill.