The governmennt should not regulate religion, but members of government should not leave their faith at the door for policy making- they have to vote in accordance with their faith.
lawmaking should always have a secular justification. if there is only a religious reason for a political decision/vote, then that would be unconstitutional in the US... and i would not want it in a truly secular country.
if a country wants to properly protect minorities and ensure equal treatment of all, allowing religiously based law making would allow the majority religion to persecute minorities and make life inhospitable for nonbelievers. i hesitate to think that you or any other christian would want to live in a country where muslims for example implement religious-based law, but under your belief then that would be permitted.
imho our visions for an ideal government should be universally applicable, not uniquely tailored to the religious or ethnic majority that resides there.
That would not be unconstitutional in the US. All that the Constitution says is that we can't establish a state religion or require/ban the practice of a certain religion. It does not say that we are to be a secular society, nor does it say that legislators need to leave their religions at the door. "Separation of church and state" is even nowhere to be found in the Constitution. But, the religious clause of the First Amendment is designed to protect religion from the government, not to protect the government from religion.
