Thor's Cross and the Wolf Cross

The Culdees traveled far and wide in their quest to share the Gospel. There is evidence of significant success amongst the Norsemen. What aspect of Christ's strength was so attractive to the Vikings that they traded "Thor's Hammer" for the "Wolf Cross"?

Culdees, Part I

The Culdees won over the pagans and druids but did not become pagan. The Culdees were Christian, but would not become Roman. They were Celts, to be sure, but what were they that the pagans saw them as progress and the Romans saw them as threat?