god rules?

today i worked in a church basement ripping up a tile floor and i went to the bathroom and there was some vandalism carved into the stall.. someone took a sharp object and carved "god rules" into the wall..
   im not a religious person.. i think i am smart enough to understand that it is impossible to be pregnant without having sex and give birth to the only person to not sin once in 30 years, or can walk on water, feed 5000 people with 5 loaves of bread, etc etc...

 but anyway... it got me thinking, is vandalism not considered a sin by those people? or is it ok if you vandalize if you carve something like "god rules" into a bathroom wall instead of "for a good time" with your ex- g/f's phone number..
      im fascinated by the huge amount of gray area that there is in religion.. i have tried many times to have conversation with religious people about it but anwsers like "because he was gods son" and "because it says so in the bible" just arent good enough for me.. if someone can give me a real educated anwser to how it was possible for moses to split the red sea, i would love to hear it.

until then... this still makes alot more sense..