(Very big generalisation, so get too mad..)
My observation from outside of the States on America's love affair with the car. When the rest of the world was trying to survive, USA fell in love with the first Fords and it became accesible to almost everyman. Cars in general have been relatively cheap and afforable for most people. Also, with open spaces that you enjoy, a car was a necessity in order to get around. This set the scene for the car to be seen as a commodity/consumable. It was treated like the washing machine, the vacuum clean, the toaster and the kettle. It was an item that was easy and relatively cheap to replace. (Look how badly some people treat their cars - Pimp My Ride) The big 3 loved this as sales volumes hid the the inefficiencies.
Europe, on the other hand, had dense populations, busy cities and no 'space' to cruise in. They had public transport. The need for the car was not as high, so volumns where less and hence prices where higher. If someone was going to buy a car, it was for a longer period due to the price and hence the expectation for better quality. The car was not seen as a commodity, but a luxury, and they where willing to pay for quality. European car manufacturers have been under pressure to keep things as efficient as possible, provide quality and stay in business for longer than the big 3.
The East, to play catchup, took the page from the US, and the Europeans, first, the US, get them out there, cheaper than the rival, one they had market, share, bump up quality to european standards.
We here is South Africa, we have our fair share of Japanese and Korean cars, but most households have 2 cars (no safe public transport). Audi, BWM, MERC and VW and Toyota are main choices. Cars are expensive here and and an entry level car is about an 2-3 years average earnings. This means that when we buy we want quality, and reliability, hence the makes that do well here. In the last 2-3 years, the big 3 have been sending their stuff here, cheaper yes, but interiors, and finishing are honestly crap. The plastics are worse than my kids toys. I won't buy them as I can afford not to. I have only ever own VW, Audi and Porsche, and I can't go back.
Would you buy a Big 3 car with german quality and european prices? You might, but the average American will not.