So if my religious teachings believe that abortion is a sin, can I use this to prevent the school from taking my daughter for an abortion without my permission? Can I also request that all other children in the school be prevented from getting a school sanctioned abortion because it is a sin to me? This has been tested and the courts have found that this is not a reason for denying abortions to school children.
Is it because my sin is a Christian sin, and thus not as important as a Muslim sin? I think I detect a double standard here.
> So if my religious teachings believe that abortion is a
> sin, can I use this to prevent the school from taking my
> daughter for an abortion without my permission?
Nope, but you can use it to not have an abortion yourself.
> Is it because my sin is a Christian sin, and thus not as
> important as a Muslim sin?
Nope, it's because neither of the examples you gave is causing YOU to violate your religious principles.