In this timeline, we won't worry about Sweden's history until the year of 1081.
Eric the Pagan
In the year of 1081, a young Swedish man from Uppland, whose name was Eric, who believed in the old gods. His nation was under pressure of Norway, and his beliefs were threatened. He decided to go forth and unite his nation under the old gods. He was very popular in Uppland and the rest of Northern Sweden, and he gained many followers. He then went to South Sweden to gain more followers. He didn't gain as much followers, but still more people joined. He than decided to declare war against the Swedish crown.