Pope Benedict XVI

Every State has the primary duty to protect its own population from grave and sustained violations of human rights, as well as from the consequences of humanitarian crises, whether natural or man-made.

There are clearly many good politicians who are guided by religious belief, so the mix can work. But there's a line to be drawn. It would be hugely dangerous for a country's laws to be set by the scriptures, and particularly those of the expansionist religions.