If you are actually a Christian, you should be following the Christian commandments:
"Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the law and the prophets."
Matthew 22:36-40, KJV
if however you are not really Jewish, but like to pretend you follow (some) Jewish laws, then you might pin your hopes on selected parts of the Old Testament, for example not wearing clothes of mixed fibres, and you might say that the only reason you are a conscientious objector, and not a murderer, is because you have picked out "thou shalt not kill" as one of the bits that appeal to you.
However, the reason animals (including most humans) don't usually kill other members of their own species, is that they are genetrically programmed not to. The laws aren't what stops us. The laws reflect what is generally considered to be normal and acceptable behaviour which is inherent and natural to us. Konrad Lorenz wrote some interesting articles on this.
This behavour is normal, and was normal all over the world long before Christanity was invented.
So you are wrong.