In the 4th Century some Jewish Christian groups maintained that Jesus was himself a vegetarian.Epiphanius quotes the Gospel of the Ebionites where Jesus has a confrontation with the high priest.Peter could have at least selected some sheep or cattle and killed but he didn’t.
Philo says that the Essenes, “being more scrupulous than any in the worship of God […] do not sacrifice animals […], but hold it right to dedicate their own hearts as a worthy offering”.
The Clementine homilies, a second-century work purportedly based on the teachings of the Apostle Peter, states, "The unnatural eating of flesh meats is as polluting as the heathen worship of devils, with its sacrifices and its impure feasts, through participation in it a man becomes a fellow eater with devils." Although early Christian vegetarianism appears to have been downplayed in favor of more "modern" Christian culture, the practice of vegetarianism appears to have been very widespread in early Christianity, both in the leadership and among the laity.
Origen's work Contra Celsum quotes Celsus commenting vegetarian practices among Christians he had contact with.
The Reverend Andrew Linzey has supported the historical view that Jesus was a vegetarian.
In his book, The Lost Religion of Jesus, author Keith Akers presents evidence that the historical Jesus was vegetarian.