The Roots of Christian Veganism
When it comes to Christianity and veganism, there can be no doubt, a strong tie.
Some will say, the diet in the Garden of Eden was that of raw veganism, even fruitariaism: "And God said, Behold, I have given you every herb bearing seed, which is upon the face of all the earth, and every tree, in which is the fruit of a tree yielding seed; to you it shall be for meat" (Gen. 1:29). In the much later writings of the Prophet Isaiah we see "He that killeth an ox [is as if] he slew a man." (Isaiah 66:3).
For the early Christians, there was dispute.
At the early Jerusalem Council, the disciples were urged to abstain from things strangled and from blood (Acts 5:19-20). Paul the Apostle ridicules those who "eat only vegetables" as "weak in the faith" (Romans 14:1-4), so we know that some early Christians interpreted the Gospel of Christ as that of a vegetarian, if not vegan, diet. If we think of the Gospel of Christ as that of 'doing to the least of these my brethren" as "having done this unto me", surely a faithful Christian may not eat animals.
The tragic and yet most glorious aspect of Christian faith is that of Christ on the cross, the final sacrifice... there was no longer any need to sacrifice animals on the cross. Jesus of Nazereth and the Christ of faith exemplifies the "crucifixion" of so many of the "least of these my brethren." Expanding our awareness of the "do unto others" commandment to "the least of these my brethren" is the expansion of Christian faith unto all creation, as Christians are commanded to do by faith and grace.