Is that fair? Since we have no pre-Christian sources to compare to, it is hard to say how fairly Snorri represent the tradition. (Obviously the bit where he explains the Norse gods as descendants of princes of Troy is of dubious authenticity.)

That's exactly the problem - we don't know. There are many elements that look suspiciously like attempts at Christian syncretism, like Baldr's death and resurrection, and Ragnarok (a fiery apocalypse survived by one man and one woman, where one God reigns supreme.)

All we know is that there was Christian influence, because Snorri was a Christian, living and writing in Christianized Scandinavia to a Christian audience.

what's your basis for saying that?