Then you would need a different game. This game takes place in valheim, a realm other than midgard(our universe) where there is magic. It's also based on viking mythology, there is mostly some canonical mythological legitimacy to everything you see.

What you want is a different kind of game. Where you would, say, raid Christians in England or rival vikings. That would be a completely different kind of game without mythological creatures like trolls, goblins and undead too.