What evidence do you have to support your rather strange claims about Scandinavian law? Your claims are not in line with books or scholars on the subject. What are your credentials?
As a Scandinavian lawyer I have to disagree with your frankly unfounded claims on the basis of our legal history. Our law is built on the foundations of both Roman (Code Civil) and German (BGB) law. If that's not solid and strong then nothing is! Most countries in the world have similar foundations - with the exception of the former British colonies and some Muslim countries (mixed).
In modern times our laws have absolutely been constantly maintained and expanded with new laws from both national, regional and European sources. You do realize all the Scandinavian countries are subject to both the Council of Europe and EU law (either directly or indirectly)? According to most ratings, reviews and analysis human rights are better protected in Scandinavia than in the UK or US.
You are either ignorant or lying when you claim that Sweden or any other Scandinavian country would extradite a person to the US more easily. The US has been denied their own citizens on the basis that even US prisons are not satisfactory in terms of human rights according to our courts! The threat of the death penalty means a whole lot more to civilized countries where it's already illegal. It's also illegal under our laws to extradite if there's even the slightest chance that he could receive capital punishment! I can refer you to countless cases and verdicts.