Most Fins are Nordic, the Fins who dont live in cities look a bit different due to living in snow 24/7.

You sure it's not the clash of different genepools in different geographical regions with the Balto-Finns, the Sami, the Swede-Finns and so on?

You can see big differences between Islanders and Mountain people in Norway as well. Same for southerners and northerners.

Yes, we too have different ethnic groups, usually thought to be based on tradition geographical connections. Did you know that the largest population of Sami have been in the capitol for many, many decades?

Islanders in Norway had little genepools until the 1990s, not many people from outside the islands would move to these places, so have the same people making kids in the same place for hundreds of years

Here's a traditional saying from the island community a lot of my family comes from, "What would we do if not for the ocean - Would we have to carry our boats everywhere we go?!"

one of the islands I know of it was 'normal' with cousin fucking due to not many different people living in those places

They should have hopped in their boats and rowed to the closest party serving three communities to find a partner from outside their family like normal, horny and isolated people used to do.