Globalization has some problems. The benefits so far have massively outweighed them, especially if you take the long view. How about we try to fix those faults, instead of retreating and isolating?
We do have unquantifiable long-term risks but I would wager you don't want to live in the days where you did from a small wound because we don't have the technology or scale to provide antibiotics.
https://www.bbc.com/future/article/20190111-seven-reasons-wh...
If you don't want globalization and think multiculturalism is the devil, it's kinda hypocritical to decry isolationism keeping away the global culture you do want.
I don't believe in utopia of full 100% globalization (one nation? one army?), but it definitely seems like a good default, and splitting the internet is kind of a worrysome trend.