It would take too long to respond to all your questions or correct where you have been mis-informed in one post so I recommend you study the origins of the Bible, especially the various translations from the original Hebrew. You mention the Sixth Commandment "Thou shall not Kill" as a moral guide and wonder if people would be less inhibited to "kill" sans religion but what most people don't know is that the original Hebrew text of the Decalogue was "Thou shalt not Murder". There are multiple examples of killing that went unpunished in the Bible e.g. David slew Goliath just as there are examples of murderers that WERE punished such as Cain when he slew Abel. We need to differentiate "killing" from "murdering" when we discuss the Bible. Speaking personally, it didn't take much of a leap of faith for me to believe in God...he has shown himself to me many, many times in my life and has actively protected me from many dangerous situations. I once was T-boned in an intersection by an 18 year old girl late for a Hallowe'en party who was doing twice the legal speed limit in an 1988 Chrysler LeBaron. She hit the driver's side door of my vehicle causing it to simultaneously buckle inwards as the floorboards were pushed up to hit the dash. My vehicle then rolled over and came to rest against another vehicle. I had no side curtain airbags and took the full force of the collision with my head, shoulder, and hip. All I remember was an overwhelming sense of peace as I felt two giant hands cup my body to protect it from the force of the crash. When I was able to extricate myself I walked over to a lawn and had a peaceful nap while mayhem ensued all around me as emergency vehicles arrived. I was taken by ambulance to to the local hospital where the trauma team had been forewarned of a "driver with serious injuries". The doctor examined me, found no injuries and asked me "Where's the driver?" I told him I was. He told me I must have been the passenger to have come out of the crash unscathed and continued to ask all around him, "Where's the driver!?!". He was incredulous when he realized that indeed, I was the driver. I was released soon after with no injuries. Many Christians believe in Guardian Angels whom God sends to watch over us....mine is a very powerful one.
I've heard of this, the original hebrew saying "thou shalt not murder" rather than as is currently written. And it makes complete sense, do you have any idea where I might find information on this? I've wanted to find that out but have no idea where or how to search for it.