The question is whether globalization is a net positive and whether people understand that, even if it comes at a cost to themselves personally.
It should be noted that modern globalization (post 1945), with Bretton Woods, GATT/WTO, container shipping, and eventually the internet creating the integrated global economy we have today, is but the latest milestone in a long history.
Industrial wave of 1829 - 1914 radically reduced the cost of moving goods and information.
The first globalization happened 1490s - 1800s, when Columbus’s 1492 voyage and Vasco da Gama’s 1498 route to India created the first truly intercontinental trade and migration networks, linking the Americas, Africa, Asia, and Europe for the first time.
That's moving the goalposts. While economists acknowledged there would be some disruptions, in the 90s the vast majority of them downplayed what turned out to be prolonged negative effects to huge populations in richer Western countries. And, ironically, it was those negative effects that led to the rise of nationalism and the dismantling of globalization that we see today. I understand folks' objections to some of the opinions and writings of Paul Krugman, but I give him credit for admitting he was wrong: https://www.bloomberg.com/opinion/articles/2019-10-10/inequa...
Sure, there aren't many people who deny that globalization lifted millions out of poverty in East Asia. That's not really comforting to folks in the Rust Belt whose communities have been hollowed out and devastated.