I am new to Paganism, so maybe this a very common question with an incredibly simple answer, but from my brief research I found nothing.
The numerous branches of Paganism have different beings who serve identical or very similar functions. Take thunder, for example. Celtic Pagans say that thunder’s god is Taranis. Norse Pagans believe that it’s Thor. Greek Pagans have a hunch that it’s Zeus. Roman Pagans suspect that it’s Jupiter. Slavic Pagans suggest that it’s Perun. And so on.
I am presuming that the various alternatives are never sources for heated arguments (correct me if I am wrong). So my question is, how do you reconcile a multitude of beings who all share the same job?
My experiences with paganism and pagans over the decades has been that mostly gods and goddesses are not usually taken literally but as ways to connect with various aspects of nature or representative of internal psychological states and chosen by people for reasons of personal affinity. The deities may come from actual religions that existed in the past and were worshipped in particular ways but the majority of pagans I have interacted with take a much more abstract syncretic approach. Individual deities that share the same or similar functions are taken as different names for the same thing (more or less). The basic idea of syncretism is also quite old and the modern monotheistic approach of "my god is the only right one/one that is real" is relatively rare in the ancient world; first making an appearance in 18th dynasty Egypt under Akhenaten if I'm remembering correctly. The Romans for example never really tried to obliterate native religions of the places they conquered and often imported foreign deities. Notable exceptions for those religions that practiced human sacrifice, which were persecuted quite heavily (side discussion on their own hypocrisy isn't really relevant to your question though). Obviously there are bound to be those in the modern pagan movement that "believe", but I honestly haven't met many literalist pagans. BeamBrain's friend's take is the closest thing I've seen to that with any frequency.