Norway - Celtic/Norse bucket from vikingship grave

Close-up of the details on the celtic or Norse bucket found in the vikingship Oseberg grave. Many people might think it looks like buddha, but its not, its entirely north european.
The man pictured here is a celtic man in a ritual. They killed young men to be messengers to the gods, then put them in a sitting position with the legs crossed like this and dried.
This is one theory, there are some problems with that theory though, as the celtic religion had been gone for over 200 years when this bucket was created.

Another theory is that it is depicting a norse/germanic shaman ritual. Another figure like this has been found, very similar but without the legs crossed.