Why do christians eat meat?

I am a hindu secularist and am trying to study all the major religions of the world Upon studying Moses' 10 commandments I found the fifth commandment: > Thou shalt not kill So why does christians kill animals and eat meat? Biologically it is logical as christians in the medieval era had to endure the winter's cold and during the winter there was no other food source than meat but atleast the religion should allow it Also another commandment: > Thou shalt not steal Also supports this argument as killing animals means stealing their vitality and nutrients for your own consumption. [ I am not writing this out of some kind of hatred against meat-eaters, even though I am a hindu, I am a non-vegetarian ]