Shinto is polytheistic, involving the veneration of many deities known as kami, or sometimes as jingi. As is often the case in the Japanese language, no distinction is made here between singular and plural, and hence the term kami refers both to individual kami and the collective group of kami.
Many people believe that the roman empire fell due to a couple of economic issues, as well as Germanic invasion, and the Empire being split between east and west.
It made the people desperate for help so they looked to the government for help which then gave them the perfect opportunity to enact totalitarian regimes