Our brains don't think in terms of statistics, we are very bad at numbers. That's a scientific fact, see Daniel Kahneman's "Thinking, Fast and Slow". So to say that if 20% of the world prison population is located in the US then it's normal to think about the US when you hear "solidarity confinement" is plain wrong. There's no media bias like with school shootings either, you don't read about US prisons in European media every week. Even the mainstream US media don't talk about US prisons much. Somehow you fail to see that in the discussion about Danish and Swedish prisons one should probably consider Danish and Swedish prisons.