The Grumpy Celt said:
But the movie makers could be bold enough to say the Native Tribes of the North East could take care of themselves, thank you very much.
Yeah, but from a dramatic point of view (or what Hollywood thinks of one), it wouldn't be as good a story.
I mean, first off, stone age equipment vs iron age equipment = victory for the people with iron age equipment, unless they are massively outnumbered. And the people who are outnumbered are automatically sympathized with. This way, it makes the natives the underdogs.
Secondly, Hollywood loves a fish out of water story. While it's often an American or European in movies from Hollywood to do it, and save the "natives" while adopting some of their customs, it really depends on the setting. Look at all the Jackie Chan movies where he comes to the US and saves us, usually having to put up with a bumbling partner who teaches him to be more "American". If nothing else, it stretches out the story, too.
Plus, it's apparently a remake of a Finnish story with apparently a completely different setting (Finland) where the plot makes more sense. But if they change the plot, it would no longer be a remake, even though it's probably offensive to everyone (Native Americans, Vikings, New Zealanders)