Our government has already been divided to the point of near-uselessness by competition between democrats and republicans. Imagine what it would be like if we had Catholics, Baptists, Methodists, Protestants, Muslims, Jews, Buddhists, Hindus, Sikhs, Taoists, Agnostics, and Atheists in the mix too? It would be total political chaos because there would be way too much difference in opinion over every issue, no matter how big or small. So it is better to keep the government secular and to not favor any religion in particular.
We are a very multicultural society and a very multifaith society, this should mean that instead of leading under one faith we should take ideas form all faiths, which (if done properly) would make a super state and it would probably be a challenge to tell where which law came from which as more things unite faiths than divide faiths.