Now we're getting into semantics, but the point is, it says "including", and you can't "include" Finland and Iceland into Scandinavia. That would be like saying

Now we're getting into semantics, but the point is, it says "including", and you can't "include" Finland and Iceland into Scandinavia. That would be like saying "North America (including Brazil and Chile)". You could, however, say, Scandinavia PLUS Finland and Iceland - but that's not what OP wrote.