That’s right Icelanders lack a belief not just in religion but also of gods. In fact they are increasingly interested in complete separation of church and state.
Surely then Iceland is a violent crime filled state. A quick Google search reveals Iceland as being in the top five for lowest homicide per capita!
Now consider the religiosity of the most violent countries. This is of course an over simplification of complex patterns of behaviour but clearly religion doesn’t provide the guidance people need.