>>9839358Charlemagne genocided the majority of the Norse religion, this instigated the vikings raids and invasions.
By the way Scandinavia never really converted culturally, it was most superficial and took centuries well past the middle ages for them to actually be Christian.
Folktales and myths dominated Scandinavian culture, and we took the first chance we got to leave (protestantism). And Christian practices are dying out completely, while the old traditions are immortal.