Ireland was seen as the Wild West, even into the 1800s. So when you went there as a missionary, you knew what you were getting into. Ireland was seen as a group of people not worth saving, and Patrick wouldn’t stamp out their culture. His mission was to bridge the gap between pagans and Christianity, to endow pre-existing pagan theologies with meaning. He established a relationship of reverence and respect which the Celtic people ultimately returned.
Giving the Eucharist to a werewolf is totally above board, as long as the werewolf hasn’t been divorced and remarried.