Well, homosexual marriage is still widely illegal, mostly based on the religious convictions of lawmakers. Any laws about what can and can't be done on Sundays are certainly based on religion. Laws about nudity, drugs, prostitution, and polygamy probably all have some basis in religious belief. There are school boards all over the country, most notably in Texas and Kansas, who are dictating that religion be taught in schools. They have required that "Intelligent Design" to be taught as a theory alongside the theory of evolution. In Texas, they are requiring text book authors to paint a prettier picture of the Christian foundation of the country. People are allowed to send kids to religious schools where they are taught to believe -- and be proud of it -- things that aren't possible. I think that's part of why the Republicans are able to convince so many people to believe their crap.

It's not law, in fact it's illegal, but no one who is not a religious person will ever achieve high political office in the U.S. This is a wide-spread and generally unquestioned bias that plays itself out in the way our laws are made.

If you get out of the United States or Europe, many countries have very stringent religious laws. Even in Europe, there is a push on to make insulting someone's religion illegal.

So, yes, lawmaking is heavily informed by religious belief.