Not that there is any reason for it to. I understand pride and patriotism, but a true global economy is what we are eventually going to end up with anyway. If foreign manufacturers made shitty cars, no one would buy them. If no one competed with the big 3 here, they'd get complacent and you'd get shittier cars from them. Not that they'd make bad cars, they'd just be less pressured to get that extra horsepower to compete with the german coupe, or the extra doodads to compete with the big european luxury sedans etc etc. Think about every car commercial there ever was, they all say "even more better and cool than *other car manufacturer*"
I don't really understand the import hate anyways. Those companies started out making cars for their own people. But Japan is a tiny ass island. If they wanted to survive and grow and make money, like all of you do, they had to expand their market, and the US is a huge automotive market. It just makes business sense to sell your product here. The fact that these foreign companies invest over half as much as the domestic automakers (going by that graph) just shows how dedicated they are to the US market. Especially when you consider how much cheaper it would probably be for them to build all their plants in mexico and just ship across the border.