Why should christian values be placed above the values of others in the law system? I want to take christians to court for telling me I'm going to hell for not worshipping their god. I find it offensive. This will not happen. So fuck christianity.
...for brevity's sake, I'll say I "believe" in science... because I'm not an immature fuckwit, I couldn't care less if someone tore up a chemistry book in plain sight, ignited the shreds, and pissed on the embers... if anything, I'd find it funny, especially if they paid for it.
The laws of particular places will always be strongly influenced by the original religious system of an area, because if the majority of the inhabitants of the area will understand the laws and abide by them, as they correspond to their belief system. Using people's fears of religious wrath would have been the most effective way to keep the people in line.
In regards to what you were saying about the laws of nature, I don't agree that they are 'ghosts' things such as gravity, air and magnetic forces all exist. Even though we can't necessarily feel them with our own senses, we can observe their effects or observe their effects on other things. It is human nature to try to understand new information or phenomena, and to create a basis for this, items or phenomena have to be identified by identifying common characteristics and categorising them accordingly. New discoveries and theories are always being recognised and identified, as the universe is in a constant state of change. Sometimes it takes a tiny development in technology or even a brilliant mind to see it. These theories and ideas are always subject to change and alteration, with the gathering of information, but their existence and effects cannot be denied, regardless of whether they have been exhaustively defined and explained.