Let's talk about the freedom to indoctrinate children with supernatural claims. Sure, parents have the right to express their religion, but as Dawkins has so famously pointed out, children are not born, for example, Christian children, but the children of Christian parents.
The state may try to protect children from indoctrination with beliefs such as "Blacks are bad" or "Women are chattels" but when it comes to "There is a magic universe creating agent who watches you all the time" or "This statue of a man being tortured to death on a cross is actually representative of something good" the state backs away.
I support the notion that children be educated about religion, otherwise it's difficult to understand the behaviour of some of our fellows, but schools are rightly prevented from
promoting one set of crazy beliefs over another. Thus the freedom of religion is also the freedom from religion. If reliant on strength of argument to convince skeptical youth how long would religion last?