NAFTA was passed in the very early days of the internet. Here's a great quote about it from former presidential candidate Ross Perot via wikipedia:
"We have got to stop sending jobs overseas. It's pretty simple: If you're paying $12, $13, $14 an hour for factory workers and you can move your factory south of the border, pay a dollar an hour for labor, ... have no health care—that's the most expensive single element in making a car—have no environmental controls, no pollution controls and no retirement, and you don't care about anything but making money, there will be a giant sucking sound going south. ... when [Mexico's] jobs come up from a dollar an hour to six dollars an hour, and ours go down to six dollars an hour, and then it's leveled again. But in the meantime, you've wrecked the country with these kinds of deals."
Perot was from Texas, and mocked by corporate media as a clueless hillbilly for suggesting that NAFTA would be a bad deal for Americans. It was one of the few issues Noam Chomsky and Rush Limbaugh and all the major unions agreed on. Trump, whether sincere or not, uses it as one of his main talking points because it is absolutely true. Selling out our capacity to manufacture our own goods has been a terrible choice for Americans. We can't make the things our civilization needs to function. We have hollowed out entire metro areas and replaced steady paychecks and fairly cohesive social units with "gig" work and broken families.
That's a long way of saying their memory is accurate, but I think it's a critical moment to understand in modern US history. NAFTA was a big fucking deal, and the owners of corporate media spared no one to make sure it would get passed. They understood the power it would give them in terms of wealth accumulation and bargaining power to beat down unions and wages. Everyone thought Clinton wouldn't capitulate since it was unpopular with Democrats, but Clinton was attracted to and further corrupted by Wall St power and depended on them for guidance.
For a lot of Americans, NAFTA was the beginning of the end of their community. They are still pissed off about it, and that's the reason the criticism of the Clintons can turn vile in certain circles. It's not entirely unearned. I don't like the Clintons, though I voted for her as the lesser of two evils in 2016.