public policy should never be the result of religious doctrine.
take two cases:
1. murder is illegal. just about everybody, regardless of faith, thinks killing when not in personal, life-threatening danger is bad. the 1% who think otherwise are decidedly crazy. also, the you can look at societies where that taboo broke down and see very clearly that it's bad for the society as a whole.
so, yeah, making murder illegal is a good move. it's not religiously motivated and is has been shown to be good for societies who embrace it as a law.
2. contraceptive education. the christians and the muslims historically come down against this. atheist/agnostics tend to be pro. so far, (us) public policy is decidedly anti. all the evidence in countries where contraceptive education is embraced, and in studies regarding contraceptive eductation, show that it's unmitigatedly positive to educate teens about the proper use of contraceptives, especially condoms. far lower pregnancy, lower STD rate, and -- perhaps counterintuitively -- a higher rate of abstinence among teens who receive contraceptive education.
in this case, public policy against contraceptive education is a bad idea. it's been demonstrated to have a good effect where it's embraced, but religious beliefs prevent it from coming into force.
now, if your religion forbids teaching contraception, you should absolutely have the right to ask that your child go read c.s. lewis in the library during that class. but you should never, ever have any say over whether or not somebody else's child has access to the information.
see also abortion, gay marriage and buying alcohol on sunday.