Why are you interested in Scandinavian traditions and not Slavic?
YYY: The fact is that the Slavic culture was soft (tree, barley, leather), so Christianity easily destroyed virtually all heritage (just burned), and the Scandinavian runic texts remained on stones and iron, many times more than the artifacts.
xxx: Ah, as I sometimes want to do here as you take and make a powerful non-application statement, but I have an istfak behind my back.