To follow up a little more on what Kandy wrote about perfection in Christianity:
Jesus tells us in Matthew 5:48 that we are to be perfect as our Father in heaven is perfect, and even though, as Kandy says, we cannot be perfect (at least in this lifetime), we as followers of Jesus Christ should be striving for that perfection.
In Matthew 6:10, Jesus teaches us to pray for our Father's heavenly will to be done on earth as it is in heaven. We know that there is no death in heaven (Revelation 21:4); therefore, as Christians, we should also be doing everything we can to eliminate death here on earth, which to us means to be against wars, capital punishment, abortion, and the killing of animals for food, clothing, entertainment, and experimentation.
If we now couple this with the fact that there was no death in Eden, we can know what a major component of living in the will of God is all about. We no longer should go along with the corruption of this earth, but work for its restoration as peacemaking children of God, as Jesus (Matthew 5:9) and Paul (Romans 8:18-23) teach us.
To us, this is a simplified way of looking at why Christians should be vegan animal rights people.