interior of 12th century Urnes Stave Church in Norway. Image from The Art of Scandinavia.
Below text from The Germanization of Early Medieval Christianity (Oxford University Press, 1996) by James C. Russell:
"The early medieval Germanization of Christianity, in most cases, was not the result of organized Germanic resistance to Christianity, or of an attempt by the Germanic peoples to transform Christianity into an acceptable form. Rather, it was primarily a consequence of the deliberate inculturation of Germanic religiocultural attitudes within Christianity by Christian missionaries. This process of accommodation resulted in the essential transformation of Christianity from a universal salvation religion to a Germanic, and eventually European, folk religion. The sociopsychological response of the Germanic peoples to this inculturated form of Christianity included the acceptance of those traditionally Christian elements which coincided with Germanic religiosity and the resolution of dissonant elements by reinterpreting them in accordance with the Germanic ethos and world-view."
