This appears to be an allusion to Saint Peter, one of the twelve apostles and the first pope. Peter is followed by the words pacifism and pagan, both words that be easily associated with Peter and religion. Pacifism is an opposition to war and violence, which is something that Jesus preached and something that his disciples would believe. A pagan is someone who either follows a polytheistic religion (such as in Ancient Rome) or who has little or no religion and delights in a hedonistic lifestyle.
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