If you mean that by choosing one city in the US vrs the whole country's rate then you're right.
But my point was that Sweden is incomparable to the USA (Sweden has a population approaching 10 million). You'd find it very hard to find a city in the Nordics approaching that of some in the US.
(1) Yes, well I think there's no disagreement that Sweden is far more homogeneous than the US.
Sweden is 99% Caucasian and 66% Lutheran. The US is 63% Caucasian and 23% Catholic. Sweden has 10 million? That's the metropolitan Chicago area.
(2) Here's the way averages work: if US homicide rate is 4.5 (Illinois is 3.5 but let's stick with the national rate) and Chicago is 27, there are five Chicago-equivalents with a homicide rate of 0, or nine Chicago-equivalents with a rate of 2.
Mentioning Chicago as more murderous than Sweden, but failing to mention the nine related cities less murderous is stastical gerrymandering.
But my point was that Sweden is incomparable to the USA (Sweden has a population approaching 10 million). You'd find it very hard to find a city in the Nordics approaching that of some in the US.