When did people stop believing in the old gods like Greek and Norse? Did the Vikings just wake up one morning and think ”this is bullshit”?

Question

When did people stop believing in the old gods like Greek and Norse? Did the Vikings just wake up one morning and think ”this is bullshit”?

In:

Answer 1

For the Greek gods, the Roman emperors forced all the temples to close, the popes ordered the books to be burned, and eventually the traditions just weren’t passed on.

Charlemagne cut down the sacred trees and forced the Saxons to convert, and basically the same thing occurred.

The Northern Crusades crushed the old Baltic religions.