I mean, I can understand how Zoroastrianism might have had an influence but the Three Wise Men being Zoroastrians isn't all that important: we don't have a recurring motif of an eternal flame or anything. I think the usual response to what influenced early Christianity is, we don't really know. But I think its safe to say that its majority (if not absolute majority) influence was very definitely Jewish. Yet, I don't see why people have to assume that some of the more unusual trends in Christianity that people seem to find so very objectionable (for reasons I don't understand) couldn't be just be an organic growth and not a deliberate attempt to imitate or subvert or whatever.