Or did stagnant wages drive Americans to buy what they could afford instead of products that would last?
We also have many US manufacturers moving sourcing their subcomponents from overseas to save a few cents per unit, there's no way to prevent that, nobody is going to check the BOM from everything they ever buy.
I think collective behavior is a large component but it is not quite right to declare it as the primary driver.
What if people could have purchased American made goods but this means that they would have had to have less or what they did get wouldn't be as good.
For example, I get a 40inch TV instead of a 65 inch or I buy a set of American made screwdrivers but then I can't get a bottle of Vodka.
Most people have their basic needs met. They just want as much as possible for their money even if it harms other Americans. At the same time, if they happen to work at a factory making extension cords, they'll want people to buy their US made cords to protect their job.
Because most people are selfish when it comes to people who aren't family or friends.