Catholic's and Christians are two different things. Christians go by the Bible, and Catholics' are Apostalic. Catholic's believe that Jesus did away with the "eye for an eye", and said, "turn the other cheek", and He did, but Christians go by the OT at times, and Catholics go more by the New Testament is what I think. Just my opinion, but like I said they are very different theologically. I'm Catholic, so I think murder is always wrong. It's in the Ten Commandments, and that's OT. I'd like to hear what, or how Christians came to this conclusion as well, cause it's confusing to me.