In the name of "religious freedom" would you allow, say neo-Aztec virgin child sacrifice (maybe you didn't know there are neo-Aztec's -- I do know there are), or fringe Santerian child sacrifice or digging up graveyards, or a Hindu sutee -- where the living widow of a dead husband throws herself (or is drugged and thrown) on his funearal pyre?
There is "religious freedom" within a boundary. That boundary is from the "Old Testament".
Wrong. There are many religious dictates in the Old Testament that are also contrary to generally applicable law. Selling your daughter into slavery, for example.