The second sentence explains the first. If euro media presents this caricature of mainstream America to the provincials of euroland then of course the insular masses will have no way of understanding what goes on outside their borders. And to think, these serfs and burghers have the temerity to call US the isolated ones!
Err..hold on. The comment is most media, both WITHIN the US and abroad...your media is just as culpable of dumbing down the dear pee-pul as its Euro equivalents.